alright, HERES A GOOD ONE...
broken knee
(In case you don't know/remember: from the 1994 Olympics, Nancy Kerrigan and Tonya Harding had a "fight". Tonya hired some one to hit Nancy's knee so she would not be able to compete in the Olympics)
EDIT: tashi beat me to the Olympics one but I think mine is close to athletes so i will leave it.