there are a whole series of chokes that are easier if the guy has big arms and a big neck, brabo, annaconda, figure 4 etc etc, leg locks and knee bars get ya big legs or toothpicks, the biggest challenge from Lesnar is getting past the powerful hands. that said, congrats the better fighter that night won. but submission proof becuase he's big? dude try practicing bjj...you will get another opinion.