This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Baki the Grappler
Open fractures are the least sort of horrible maiming you can expect to see in major fights of this series.
Consider for a second that your father is the most powerful creature on the planet, and he is grooming you to fight him. Then consider how most fights with Yujiro end either killing a person or maiming them, the situation for parental leniency is low for you at best.
Hey wanna throw a hit so hard that it breaks the sound barrier? How about punching the ground so hard it stops an earthquake?
Jack Hanma`s steroids affecting his body at one point it breaks down on him and vomits green liquid and the steroids themselves turned a mild mannered guy into a unstoppable fighting machine who brutalized his opponent`s