we had a guy like that in the lab where I used to work. He was always in a bad mood, had a grudge against the whole world. The problem was compounded by the fact that he used to take pro-plus washed down with Red Bull so he was just hyper all the time.
When he started slamming the glassware around we all ran for cover!! It makes the working day more interesting though don't you think?
Hib - cool new avatar!