something looks extremley fishy. There was no fight in gracie at all and he hardly put up any resistance what so ever!!!
Gracie is a 6th degree black belt of BJJ/GJJ and i do not even believe that black belts of that level give up their backs so easily in fights. In our BJJ class we are taught to NEVER give your back EVER because what happens? the fight will end by either a choke or a elbow/fist to the back of the head. Gracie then , from what looked like it to me, allowed Matt Hughes to get both hooks in ( both legs tucked under his thighs ), again we are taught to resist that as much as possible when your back is taken and not allow the opponent to anchor him self into you.
There was no bridging/rolling or any attempt to escape when matt hughes had his back at all. If your a BJJ practioner than you will know that Gracie could have done a WHOLE lot better than that.