Revenge on Wheatley

Well, can you think of anything worse than being trapped in a room eternally with three incredibly obnoxious psychos who think they belong with you because you look just like them? I thought not. Anyway, Chell and GLaDOS were having quite a laugh staring at his face after a few days. It wasn't funny after a few weeks, though, because he, himself, went insane. Can you guess what he went insane about? Adventurous facts about space. It was more annoying than the other three combined - wait, it was the other three combined.