One other personal worst:
While playing hoops at Emerson (we sucked really, really, realllllllllly bad back then, and no amount of exaggeration could amply get that point across to a degree that you might actually believed me), we were playing a road game against Curry. Now, I had no right playing Division 3 NCAA basketball, but the state of the Emerson Athletic program being what it was, you could pretty much walk on and play any sport you wanted to, if you weren't opposed to being humiliated by legit programs (Emerson actually has a good program now, but these were the Dark Ages). So, I got to play a bit in front of the Curry faithful. I had proudly squeezed myself into a 100 year old purple Emerson Lion uniform and gamely stepped in for some quality garbage time minutes. One of the Curry players drove baseline and I got in position to take a charge. He leaped, knee first, directly into my crotch, causing me to yelp in pain. The refs awarded me with a blocking foul, while everyone in the stands, players on both sides, my coach, and in all likelihood the refs, enjoyed a raucous bit of laughter at my expense (why is it that getting kicked in the nuts is hysterical, so long as its happening to someone else?).
Anyhow, I had to take myself out of the game, which stunk too, because as bad as we were, I did not get a whole lot of minutes.