Oh god, I had almost forgotten this one.
Years ago I worked for a civil engineering firm as a draftsman. It was basically a land development firm, so we had a department to handle surveying and one to handle roadways and one to handle subdivisions, and so on.

Scott worked in Surveying as a draftsman. Being young and inexperienced he wasn't paid much, so he took on a night job as a bartender at a local restaurant. He used to tell me stories about it rather proudly, about how when he was in charge of the bar no one else- not even the owner- was allowed to be behind the bar. That area was his domain, and he ruled it happily.

One night Scott was coming out of the kitchen with a full rack of glasses in his arms, so his view was partly blocked. Unbeknownst to him a waitress was behind the bar, crouched down and looking through the small refrigerator for something and had the door to the fridge wide open, so it was pointing toward him. Scott was somewhat tall and the fridge was somewhat short, so the corner of the door was at a rather unfortunate height...

Apparently Scott hit hard enough to flip him over the waitress and was unconscious before he hit the floor. The impact was enough to crush his testicle so that it had to be surgically removed. Scott was in the hospital for several days, and off work for a week.

Before he returned I unwrapped a couple of these (Atomic Fireballs, in case the link is borked) and left them on his desk atop a paper that labeled them as "Spare Parts".

The rest of the department found that to be far funnier than he did.
( The Resident Loon Not a demographic. Do not measure., Thu 24 Dec 2009, 3:04, Reply)