Professor Pedro Sauer (8th Degree red/black belt) talks about the butterfly sweep and proper head positioning in Brazilian Jiu Jitsu.
Professor Sauer shows how to get the choke even when your partner is defending.
Professor Pedro Sauer (8th Degree Red/Black belt in GRACIE JIU JITSU) demonstrates the finer points on getting your hooks (legs) in for attacking when your opponent has a tight turtle position on all fours.
Professor Pedro Sauer (8th Degree Red/Black Belt under Rickson and Helio Gracie) demonstrates a variation on the harpoon sweep when you are on your back and your opponent has you in side control. He further explains what to do when your opponent stops the harpoon sweep.