Cracked.com's Worst Life Ever: The Story of Kazuyuki Fujita’s Skull "Kazuyuki "Iron Head" Fujita made a fighting career out of having a thick skull. This is that skull’s story...Like many mixed martial artists, Fujita started as a wrestler. Unlike many mixed martial artists, he never learned a second skill. It would take him 60 minutes to describe to you what he thinks a kick is, and he attempts submission holds the same way he tries on hats– confusedly pulling in random directions with no results. That’s because his skull is measurably thicker than a normal skull. If you were to take an x-ray of it, you’d fire your medical equipment for coming in to work drunk. He was created by filling a cement truck with coconut sperm, and no one was more surprised than that cement truck."