Chris Herzog gives us a leg lock defense video that you just have to love. Chris is a Judo Black Belt and a 10th Planet Brown Belt - so, he's got the creds. More importantly, he references this leg lock position as the "93" 'cause it was used in 1993. Clever, huh?
Anywho, this is a great video that details both offense and defense from the '93, so pay attention before you get left behind when stuff like this was popular.