Bruised

Mildly horrified by the large purple bruises that have appeared on my right calf two weeks (!) after crippling myself, I decided to do a little research into what damage I might have actually done. On Wikipedia (which seems a silly and simple point of reference, given the number of medical textbooks to which I've got easy access), I found that the subentry on Calf Strain (Torn Calf Muscle) describes what happened to me exactly, from my thinking I must have somehow hit it against something (despite there being nothing obvious that I could have banged against; it felt like someone swung a bat at me), to the horrible 'pop', and my subsequent agony writhing on the floor. So now I know. Thanks Wikipedia!