So I used to go to this dojo as a kid it was called Joslin's. Anyways, we were about 12 years old when we all did jiu-jitsu(at least I was some of my friends there did it earlier). So there were 3 of us, me, Terence, and the big fat guy Josh. So me and my sister(we were not friends just saying ) were practicing as usual because she was afraid to practice anyone else, and Josh was practicing Terence. So I was kinda bored because we were doing this exercise where one person lied down, and the other would jump between the legs(it was a movement thing) and I'm watching Terence and Josh, and Josh happend to trip and this like 120-150 pound kid landed his knees straight in Terence's crotch. The guy must have been in pain for 10 minutes straight before he was finally ready to spar that class. Ever since that class, he never came to a single class without wearing a jock strap xD.