Not that I am a stunt person, but as far as I know:
- training (there are ways to fall that are more controlled and less harmful)
- hidden safety gear (thick clothing, hidden protection)
- hidden set safety (fake floors that are soft, mattresses that are removed in post, etc)
- and finally, getting actually hurt, a lot... All stunt people get hurt often, it is an actually dangerous job
It has to be the slur of which you stereotype is most likely to say (except if it is woke, in that case it will be replaced with a random slur from the top 10 most popular approved slurs)