People with real superpowers

Choi Yeong-eui, later changed to Masutatsu Oyama... was born in Korea in 1927 and later moved to Japan, where he studied karate...
He used to have live public demonstrations where he would fight and kill a bull with his bare hands... All in all, Oyama fought and killed 52 bulls, three of which were killed instantly with one blow. Forty-nine had their horns chopped off with karate blows. He gained the nickname of The Godhand and was considered the living manifestation of the Japanese warrior's maxim "One strike, certain death."
If you're thinking his skills only worked against livestock, you should know that Oyama once tested himself in a kumite, a series of two-minute fights against different opponents, each of which you must win to continue. Oyama took on 300 men over the course of three days.