The Myths and Fallacies of Unstable Surface Training

I was an expert witness in a trial for a woman, a coach had this like 60s to 70 something year old woman squatting on a Boseball and throwing a fucking medicine ball at her. She fell off toward ACL, MCL, PCL, like, meniscus, everything,. multi million dollar lawsuit that this like poor woman and poor like the coach didn't want anything bad to happen. But now the coach's life is fucked. The woman like is it hurt. She lost all functional use of her leg after that. And I'm like, listen, here's a deal. If you're swining on a BOSU, what do you try to develop