Ocean Samuel gets us fighting fit
I never realized that there was a nice way to deprive someone's brain of oxygen. One class with Peter Martell teaches me otherwise. "See how his face is getting all red?" asks Martell, politely. "That's how you know it's working." Martell is clenching my friend Walter Muschenheim's neck between his forearms and huge biceps. Walter starts to gurgle and Martell releases him from "the lion killer," a move taken from Brazilian jiu-jitsu designed to "put people to sleep." It compresses veins in your opponent's neck, which cuts off blood supply to the brain. "I felt like my eyes were bulging out of...