When debugging (hard to find) bugs, I know I've personally gotten so frustrated as to lash out on the keyboard and shout profanities at the monitor.

I have repeatability witnessed co-workers throw their computer mouse off the table in anger and frustration.

What is the furthest a bastard of bug has ever pushed you?

EDIT:

Hehehe :D it would seem this bug, er I mean post has pushed the guys to close it...

Oh well, very very interesting answers anyway.