When I'm eating a piece of pizza and just when I think I've cleared the stretchy cheese boundary, it plops down upon my chin, leaving a nice hot patch of pizza sauce on my chin.
Also, when my co-workers or boss bring an birthday card into my office and say "It's XYZ's birthday, sign this". I'll decide on my own who I want to wish a happy birthday, TYVM. I don't need you cocksuckers doing it on my behalf. Double when my suckup co-workers do it for "boss's day", which apparently is like.. 3 times a year.