Magician David Blaine is not tougher than a bullet.
In his bullet-catching trick, David was injured when the the stunt failed. Here we go...
David Blaine held a gum shield in his mouth with a metal cup in his mouth meant to catch a bullet. He then, using a string, remotely fired a rifle. The bullet found its mark in David's mouth, but the metal cup that was meant to catch the bullet failed. It slipped out of the way and the bullet shattered the gum shield. David got a lacerated throat from this ill-conceived bullet catching trick.