You don't really need an Aperture Science Hand-Held Portal Device.
With its rigidly structured puzzles, you might not think that a Portal game would be the best kind of game to trick-run. After all, there are only so many ways you can put a cube on a button and walk through a door, right?
As we've already seen, that couldn't be farther from the truth. Portal players are already trying their damndest to thoroughly break Valve's Portal 2 in the most spectacular ways.
This particular trick-runner doesn't even need to use portals to beat test chamber 20 - instead, clever laser-bendy-cube positioning (and some glitches) do the job perfectly well.
As some Reddit commentators point out, it's not uncommon to play Portal 2, find a new mechanic like the laser beams or special paint, and then completely forget that you have a gun in your hand that shoots portals. As this video shows, sometimes that isn't such a problem.