My reaction would probably be something like:

AAAAHH! Followed by poking the giant flickering face in front of me thus breaking reality.

Oh my god I don't know who you are but you look awesome lets be friends

Redlin5:
WHAT HAS SCIENCE DONE?!?!?!

Nothing. Goku just did the fusion dance with Hank Hill resulting in... um... Goku Hill? No wait!

HANKU

Oh god, whyyyyyyy!

I'll pay you 55 cents and a lump of coal to sweep the entire porch.

A lump of coal? Deal.

I'll raise you a canary, if you sweep mine first.

But Taco Stark had no mouth!

Ask her if she wants to try riding MY magic broom for a change.

Kaleion:
Slap him for saying innuendos, that's like Sacman's job, I think, maybe, probably.

That wasn't my avatar, that was me. try again.

in any event.

I would steal his gloves.

Take his glasses and hold them out of reach.

Offer him a snack then toss a grenade into his mouth when he goes to eat it.

Take his taco shield to the face, probably.

Scream then shut the door.

Did you guys escape from the zoo or a circus or something?

Yes, would like an express pass to visit it?

I'm assuming that's a zombie, so I'll close my door in a orderly fashion and lock it.

Ask if she wants to go do a heist? I assume she is a thief or a magician or something.