Well don't go through the door.

You gotta walk around it a bit so you don't accidentally go through it.
Crap, I forget what happens when you go around the room.. hmm, lemme look it up.
Oh, hah, you're farther back than I was thinking; you're pretty early on. Yeah, you need to do it. I think you might be able to get away with just touching each corner 3 times (in the right order of course).