is just what it is. >> it is a serious track to take and a huge commitment. >> i've been asking this question to everybody, but i'm actualably the experts. simone biles. >> when it first happened, i was kind of annoyed. but then i have to take a step back, really, it's your life you're going to risk, especially if she fell. >> when you think about the physics of it and you think i'm throwing my body, i'm flipping and landing and trying to stick it. >> it's a crazy sport. >> women's gymnastics has always been a paradox. it's called women's gymnastics when most of the women are under 18. and the true test of how good you are is not how much you are treated like a human, but rather how much you are treated like a machine. that's why it was huge deal when the greatest of all time herself simone biles said nope, i'm a human. see, we remember kerri strug as a hero for this vault. but what we don't remember is that she had injured her ankle