Perfect 10 routine from a college gymnast

I fell and broke my collarbone on the balance beam one time.  So.....   I'm not sure how these gymnast do what they do.  IT"S SO HARD.   UCLA gymnast Katelyn Ohashi scoring a perfect 10 on her floor routine at Saturday's Under Armour 2019 Collegiate Challenge.  Not just a perfect 10 of a routine, but she's having a blast!