Gymnastics
Olympic professionals have a way to make gymnastics look like it's easy and safe. That's because they have trained their entire lives and became the most elite athletes in the sport. Obviously, they're going to make it look easy. Gymnasts, even at the highest level, are more prone to serious injuries than many other sports.
Flying From a High Trapeze With Ease
Gymnasts are regularly subjected to a multitude of injuries that include but are not limited to bruises, broken bones, paralysis, concussions, and death. Roughly 20 people have died from gymnastics-related events in the past few decades.