I'm guessing the OP meant wrist, hahaha!
Anyway, well, as has been mentioned, falling off is a part of riding horses; no matter how good of a rider you are, you may come off from time to time...period. You just gotta buck up, saddle up, and get back on and try again.
If this is the young lady in your other thread, it sounds like she has a pony that is either too much for her, is getting tired of being shown, or arena ridden, or is just confused on what her rider is asking and is acting out because of it. They need a refresher with a good trainer, to get them both back on track.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."