RealFighter magazine recently delved behind the scenes into the making of the film Redbelt and talked to some of the key players in the martial arts world responsible for bringing the realism to the screen.
From the article:
"Mamet is a fine choice to lead the charge of MMA into the moviegoing mainstream. Over the past several years, he has earned a purple belt under Renato Magno, a BJJ instructor in Santa Monica, Calif. (In one for the "Fact is Stranger than Fiction" file, Mamet was reportedly introduced to BJJ by his rabbi.) According to Magno, Mamet walks the walk: "His jiu-jitsu is very technical and he did some boxing and grappling before. He has some good chokes and armbars," says Magno who appeared in Mamet's movie "Spartan" and helped choreograph the fight scenes in "Redbelt".