What is the worst injury you have attained from Chess?

When I played in the Canadian Junior Championship... I hate to remember how long ago that was... we were playing on the top floor of one of the University buildings in Vancouver. One of the players blundered his Queen and rage-quit by sweeping all the weighted pieces off the board, sending them flying across the room. A window was open, and a Rook flew out the window on a ballistic trajectory, plummeting four or five floors down into the University quad.

I don't know if it hit anyone, but if it did that would be another chess-related death.

Abe Turner (a 2400 player and one of the few people who had a plus score against Fischer) was found shut inside a safe in the basement of the office of the Chess Review magazine. He had been stabbed nine times in the back. An employee of the magazine confessed to the murder.

Off-topic, but here's a squirrel-related injury:

Only injury has been my bruised ego and it hurts bad! jk

Maybe someone has sprained their wrist in blitz or slammed the clock too hard and started bleeding?...

p.s. chess is NOT a sport

One year in Reno I was down in the sports book watching the Dodgers game during a round.  I went back up the stairs to check on my game and tweaked my ankle.  Kinda a chess related injury.

A doctor tried to strangle me once, during a game of chess. I decided not to do anything because I was stronger and nastier than he was so I just sat there being strangled and going red in the face until two people pulled him off. Very weird. Turned out he had a terminal illness, poor chap. It was because I wouldn't play him.

Oh I forgot. I've played a lot of club chess and on at least three occasions the chair I was sitting on collapsed.

I believe I've saved two people's lives when playing chess, each time because I went out of the playing hall for a short breather between moves. One heart attack and one young lad trapped in some ancient machinery and all mangled up.

Once i was masquerading as a Knight wandering the forest. I came across another and we began to cross swords. Soon he hacked off my arms and then leg. Of course, it was just a flesh wound. 

I once slept with the queen and upon awakening with my arm trapped under her fat torso, I saw how ugly she was and had to chew off my arm in order to make a hasty departure unnoticed.   She was really fugly.  

That's what they call "Coyote Love" because the coyote will chew off his arm in order to escape from a trap.

I blew a well played game that would have won me some money in a tournament and, once out of the playing hall, went over and kicked the baseboard of the wall.   I was limping from a mild toe injury for a few days thereafter.

I sat on a hard kitchen chair an did tactics training for hours after a couple of awfull games my ass cheeck went numb an i think i pinched a nerve in my leg i was hobbling around at work all day today lol true story. And i thought this sport was safer then tearing my mcl playin hockey again.

Then there's this unusual case of a chess-related injury:

Weird scenes at the Canadian Open - Chess Forums - Chess.com