Ok, to be specific the term injury is basically a broad subject. A cut, a bruise, and sprain, anything. They don't have to have been painful, just weird and abnormal.

For me, I had a cut on the sole of my foot, unsure how it got there but it was relatively small. No blood or anything, but it hurt like hell when I walked like a needle was jammed in it, so that small of an area. I finally looked at it after a while and to my surprise, a strand of hair was sticking out of the small cut, almost like it was wedged in perfectly. I have no clue how that happened.

Hmmm...
I've hurt my wrist armwrestling.
To this day, my wrist doesn't function at optimum capacity.

When I was seven years old, I was running around the house. I slipped and fell onto the hardwood floors in my house.
I had to dig out a small splinter from my knee.

A month or so later, at christmas time, a small zit-like pustule had appeared on my knee.
My parents tried squeezing it, and out came two new splinters the thickness of matchsticks and about 1 cm long each.

I had a glass hummingbird beak break off in my leg once. Seems like a fairly unique situation if you ask me.

I was working out in the gym, not really knowing what I was doing, when I used a leg press machine. For those who don't know, basically, you sit down in the machine, and you push a weighted platform by straightening out your legs, and then the platform resets to its original position when you bring your legs back. Anywho, I overdid it (which tends to be more likely to happen when you do heavy leg workouts, seeing as how your legs are bigger and stronger than your arms), too much blood flow went to my legs (meaning not enough blood flow to the brain), and I got some weird headaches and stiffness in the back of my neck.

These headaches reoccured, not only when I was working out, but when I was doing pretty much anything that increased my heart rate by a significant amount. I had to take about a week or two off before I could work out again.

Top this:

I have a scar on the underside of my scrotum! Apparently it's noticeable too (I don't really look around down there too much) since it's drawn some comments. You've not been in a more strange situation than when someone stops giving you head to remark about your scar. Kills the mood immediately.

I got it when I was pretty young. Apparently I though climbing over my bedroom furniture while naked was a good idea (kids do the craziest and most retarded things), slipped, and a sharp corner of a chest of drawers did a number on my man-parts.

My rabbit broke my nose a year ago.

I was led on the floor while he was hopping round me. He sat down next to my head so I looked to see what he was doing and he set off again kicking me in the face in the process.

My wife thought it was hilarious.

Bastard has one hell of a kick to him.

Prolly about the weirdest injury was being shot. I got a graze above my knee and a inch deep/3 inch long laceration in the top of my right arm. It was weird because well even bleeding like a stuck pig, the most I felt out of it was a very cold rush in my arm. I honestly expected much more pain because I have been told I am a drama queen when it comes to pain.

DrgoFx:
SNIP

I got into an argument with my older sister cos I wouldn't let her play on my MegaDrive (genesis for my usa'ers) and she pushed me backwards i fell into my open door, slamming it with my finger lodged in the lock, the door closed and the lock jammed into my finger and I have been scared for life, every time I look at my finger I think about my MegaDrive

I had chickenpox on my eyelid, still got the scar from that. I also managed to fall on a stone wall & cut open my shin pretty badly, which caused me to yell out very strong profanities in front of about 50 children on a school trip.

Top this, a fucking nail (metal nail, not your nail) stuck between the middle and ring finger metacarpals piercing throught the median nerve. Don't fucking ask me how i pulled it off, but it wasn't pleasant to remove (2 years and i still have no sensitivity in the middle finger due to nerve damage during removal).

This is a story about an injury to my penis. Buggered if I can figure out how to use spoiler tags, so you might want to just skip this if you're sensitive.

I sleep in my boxers. I wake in my boxers. I go to the kitchen in them to make my breakfast, and I sit down to eat in my boxers.

About a year ago, I had a cat. The last day that it was an inside cat was the day it jumped into my lap while I was eating breakfast. What happened wasn't really its fault--99% bad luck--but one of his rear paws went through the pee flap in my shorts, and his extended claw slid into my urethra. His weight shifted, his claw moved, and he cut my penis from the inside out.

It was a very small wound, best measured in millimeters, but a horrifying one all the same, because every time I'd pee, I'd rinse away the scab that had built up and it would start bleeding again. I got very, very tired of seeing blood in my toilet, and I eventually stopped looking at my underwear at all because I didn't want to know how spotty it was.

In all fairness to the cat, I think the physical pain was considerably less than my horrified, outraged mind insisted a bleeding penis must be.

I demolished my knee trying to kick a soccer ball. I ran up to it, planted my foot to kick.. then it's as though my legs got confused about which one was supposed to be doing the kicking and I'm not sure exactly what happened..

.. and the next thing I knew, I was lying on my back on the ground in tremendous pain. It took three surgeries, 9 months on crutches, and over a year of rehab to sort out all the damage I did and regain (most of) the use of my knee. It's not and will never again be 100%, though.

i once sprained my ankle while sleeping, i know, not the most horrific injury but a werid one nonetheless.
Since my bed is close to the wall of my room, i must of somehow got my foot in a position where it was lodged in place, and must of been moving leg in my sleep when it sprained, and i didn't even notice it until the morning and i took a couple steps.

Mine would have been 11 months of tendinitis in my right wrist. And no, it isn't from what you are thinking.

When I got it, I was in year 12 at the time, and doing music. Was practicing my musical pieces for anywhere from 4-8 hours a day getting them perfect. After a month of this, it developed into tendinitis.

11 months, 2 visits a week to physiologist and 3 cortisone injections later, it is better, but will never be 100% perfect.

That, or the time I went to the ER cause sand got in my eyes and actually scratched my retina, that was irritating.

I slammed my knee against the cage (to protect children from getting sucked into the drain) of a wave pool at a waterpark 4 years ago and it hurted for like 3 months after that. I was swimming in the wave pool and i went to the other side of the pool where the waves were coming. When the waves came, i got sucked into the water and i completely DES-TRO-YED my knee against the protecting cage which was made out of pure stainless steel..BAM ! It hurted like a mothertrucker and it knocked the wind out of me. It was a small price to pay though, because i can't imagine getting sucked into a wave pool drain...just thinking about it sends shivers down my spine.

While moving heavy wooden platforms, a random screw caught the side of my hand and left a fairly deep cut. Didn't really hurt at all. Another time I was helping set up platforms for a show we were doing when one of them split in half while I was walking on it.(sure it was poorly made of two smaller platforms, but I'm not exactly the largest nor heaviest of guys) The funny thing is that I came out of that without a scratch but my leg caught one of the same platform's legs while I was passing it and it gave me a fairly painful scratch.

EDIT: Almost forgot, in forth grade on Valentines Day I was playing freeze tag with the other kids and was right behind my friend who I'd just tagged when someone else pushed him into me and one of my front teeth hit the back of my friend's head and chipped. He was in pain but I was fine. Hell, I didn't even know my tooth had been chipped until the nurse told me.

I once tripped over a tree root sticking out the ground whilst I was running very fast and faceplanted in some dirt/gravel stuff and graised nearly my whole face. Eventually, after it healed over, my face was 78% percent covered in scabs. Not the wierdest injury in history but I looked pretty freaky at the time.

I used to throw tantrums when I was a kid where I would jump into the air and stomp back onto the ground with one foot. That stopped pretty abruptly one day when I came down... and kept going. To this day, I have no idea what happened to my leg/knee, and won't point any conjecture toward it, but I ended up crawling around on the ground for two weeks during a summer vacation. Why don't I know what happened? Because neither my mother nor her jobless, drug-dealing boyfriend had the insurance to cover me.

It started off pretty simply abadly torn hamstring and when it was almost healed i did some volunteer work that involved putting in a walking track... after a day of constantly standing and squatting my right leg now turns outwards 70 degrees

I broke my foot in half with the power of my arse.

edit

Baby-me broke her arm taking a dramatic high dive off her height chair. (I was an adventurous, hyperactive kid. Afterwards, my mom had to tape my sling to whatever clothes I was wearing so I'd stop trying to fling my arm around.)

Most unusual injury I've had that isn't me being an incredibly air-headed baby is... well, about a year ago, I gave myself a second-degree burn baking brownies.

Cutting my face open on a round corner, then thinking it was just warm water on my forehead till I opened my eyes; yeah not my greatest moment (though it wasn't that bad, especially once the stitches were in).

ReservoirAngel:
I got it when I was pretty young. Apparently I though climbing over my bedroom furniture while naked was a good idea (kids do the craziest and most retarded things), slipped, and a sharp corner of a chest of drawers did a number on my man-parts.

I audibly groaned and am now sitting with my legs closed to protect my junk. My...my testicles actually hurt. Thanks.

OT: My gigantic (read: obese) friend bear-hugged me when I was eight and my back is relatively weak.

I also had a friend who was a year older than me jump on my back when I was thirteen. It was fine for a few hours, but when we ran outside to ring in the New Year (it was New Year, obviously), I collapsed, writhing on the ground in agony. So that was fun.

Oh, yeah, I also had ass surgery a few months back for a pilonidal cyst. Kinda-sorta not an injury, but appropriate enough for this thread, methinks. I bragged at school for a while about how I had an extra orifice. I am very immature.

Hmmm... weird injuries:

1. When I was like a year old I leaped off my parents bed and cut my eyelid on a dresser. I had to get stitches on my eyelid (apparently I didn't fuss very much, but I certainly don't remember).

Also around that time I badly burnt my hand on a photographer's flash-bulb.

2.When I was around five years old I tripped while running and face planted on cement. I pretty much landed completely on my front tooth: it remained intact but apparently broke the nerve inside or something because the tooth slowly turned purple, died, and had to be pulled out.

3. Maybe a year after that I jumped off a sofa and landed with my mouth wide open on the plastic turret of a toy castle. I cut the back of my throat really badly and pretty much filled a sink with blood.

4. When I was around fourteen I was kind of play fighting in the woods with a friend. I kind of chased him backwards with a stick, and then he threw a small log at me. It hit me in the face and split my upper lip almost right through. I had to get seven stitches just on my upper lip, which seems like a lot to me for a cut that was only maybe 3/4cm long.

5. When I was working at a fast food place I dropped something back into a deep fryer by mistake (I think it was a piece of chicken) and reached my finger about 2 inches into the oil without thinking when I tried to grab it. Several layers of skin just kind of peeled off after that... :/ it was more annoying than anything though, so I wrapped it up and went back to work.

I think that's all the injuries I've had that I would call weird in some way.

Honorable mention for breaking my thumb (not a clean break, just a piece of the bone was broken off) without knowing how or when I did it. It was a little bit sore for a couple of weeks so I finally got an x-ray and found out it had been broken... no idea how.

Second degree burns on my foot after a bolt of lightning struck behind me and melted the rubber on my shoe, which burned through my sock and burned my foot.
yeah that doctor didnt believe it either until he saw the bottom of my shoe melted and my sock was blackened before seeing my foot burned. that was a shitty mile to walk.

Other then that, I had my shoulder deeply bruised when a car ran a red light and the mirror hit me while i was walking along a crosswalk.

One time I was running to the bathroom after holding it for awhile because my mother had been taking ages in the shower. I skidded on the wet tiles and slammed foot first into the wall. I thought I'd broken my toe but the pain subsided.

A few days later my toe was hurting and itching like crazy... I inspected it and it turned out that a piece of the toenail of my big toe had broken off and lodged itself into my toe, partialy embedded and partially exposed, in a wound which had become rather distressingly infected and... oozey.

I removed the toenail fragment and it all cleared up, and so the toe lived happily ever after.

That's not THAT weird, but... it's all I got.

A few years ago, I woke up with a puncture wound one day on my arm near my elbow. After three days (I forgot it was there), I realized the wound hadn't healed.

I used to tweezers and found the stinger of.....something that's been in my arm for three days.

Even now, there's just a solid mass of what I can only assume is venom in my arm. I should probably get it checked out...

I sliced open my pinky finger with a steel wire scrubbing pad at a restaurant I worked at. Not like a brillo or a steel wool pad, these things were basically a wad of metal strips that (unbeknownst to me at the time) are incredibly good at removing food from dishes because they are only slightly less sharp than a razor blade. I didn't even know I'd hurt myself until my boss asked me why I had blood all over my arm and shirt. Turned out that none of the dishwashers would use them unless there was great need, and even then they would wear a pair of gloves made out of chainmail that were originally meant for use when operating a deli slicer.