My INTP friend has an amazing sense of humor.
Unfortunately, he uses it for evil more often than not.
It seems like he gets in these moods where he can't help but be completely difficult. He'll either mock everything in his path or rearrange everything physically (putting something in the wrong place on purpose, throwing a towel over the dog, and so forth).
Now, I don't want to change him. But it really DOES get on my nerves when he's like this, especially when it's for prolonged periods. It'd be easier if I knew there were a way to redirect him if he were really getting out of hand.