They use their hands and they use their legs, but maybe the fighters of the UFC should focus on protecting their heads.

Check out this brilliant supercut of people stealing hats right off the heads of UFC fighters as they head into the ring.

Hat theft is to the 21st century what the wave was to 1980s NFL football -- a trend that no one can really explain, but looks like there's no stopping.

Look at the way these fans slip in their hands to take the ultimate sweaty souvenir for themselves. These fighters are besieged even before a fight -- you almost get the sense that walking out of the locker room and past the wild crowd may be more of an accomplishment than surviving a brutal showdown with whomever their opponent may be.