#1: When my feet are resting comfortably on something and it gets moved an inch. It doesn't even have to be an inch. It can be 2 millimeters. Either way it totally messes with how my legs are feeling about the situation and I have to completely recalibrate. This usually happens when multiple people have their feet up on something and one person doesn't get it that they can't do a leg press on the object that everyone else is using to rest on.
#2: Tim Duncan
#3: The inane library policy about showing the contents of your bag to the security guard before you leave. Why do they make you do this? They already have RFID alarms to see if you stole a book. I've been slowly reducing the amount I actually open my bag to see how little I can show them and still get by. I'm pretty sure all you have to do is make a movement to touch your bag and you're good to go.
#4: Miley - psych!
I'm sure there are more. I'll add them as I think of them - or I'll probably never look at this thing again.