Awesome. I've never seen this one. Him and his buddies sure enjoyed that one.
I remember reading a Wallid-interview (around the time I first got into MMA or martial arts) in a 1999 Black Belt Magazine about how he beat Royce and the other Gracies... intriguing stuff.
And that guy's mental haha.
EDIT: that was a clock choke:
YouTube - Clock Choke
(Couldn't embed that one)