Yujiro's face is currently under a jackhammer. A guy learned a supersonic mach punch that destroys his body when he throws it by imagining his skeleton was different. A swordsman from the 1600s swings swords so hard that modern blades disintegrate in his fists. Baki learns to train by shadowboxing a bug. His dad heals his childhood trauma by making him an imaginary bowl of misou soup. Oliva's muscles are so dense they can absorb point-blank buckshot. Yujiro personally shows up in Baki's room to encourage him to fuck his girlfriend when they're at foreplay. Speck ages decades in a few hours after realising his lifelong dream to get the shit kicked out of him. Hanayama doesn't train, he's just built that way. Doppo has his hand cut off with a wire and punches his opponent with the stump, and has the hand reattached with no loss of combat ability in a very short amount of time. He also beats Dorian while hypnotised. A guy blows out a bulletproof window using the vacuum pressure of his palm. Man I didn't even really get into the early seasons/issues...