1) People repeating things. I can barely tolerate it when someone repeats something twice, but lose it after the third time, almost every time. I could barely control myself with customers when I used to work in an insurance call center for seven years. Usually resulted in a pen flying into my cubicle wall.

2) Repetitive tapping noises. My husband is infamous for constantly fidgeting with something, especially when we're trying to have a conversation. I try hard, but sometimes, that thing he's fidgeting with goes flying.

3) AM radio. Especially talking on AM radio. There's something about the pitch that immediately sets me off.

4) People standing too close to me in lines. BACK. UP.

5) People not turning right on red. Seriously.