Most commonly attacking people around me. Most specifically ripping, tearing, and biting them.
Though, it is stupid/annoying people. Honestly, I can't say whether I actually would or not. I'd think there's a limit for everyone at which point all bets are off concerning what they'll do.
I often get strange urges to make funny noises. Unfortunately, I usually just do that.
Very rarely, I'll get the urge to just leap at a woman I find attractive. Not to rape her, probably not even to kiss her, just lunge and hug. I guess it's like the Joker said in the Dark knight; "I'm like a dog chasing a car, I don't know what I'd do if I caught it! I just DO."
That, of all things, is the urge I'm most ashamed of. It's rational, to a certain extent to want to kill people who you don't think deserve to live, logical even. Not good or nice, and not something you should actually do unless that person is an immediate danger to innocent people, but logical. Funny noises are strange but harmless. However to randomly lunge at a woman like that is the action of someone who doesn't care for other people's wishes or personal space, the sort of people who say stuff like "No means yes". I never want to be that kind of person.