Play Peekaboo Instead
We hope this guy is a trained professional who does not leave any room for error since what he seems to be doing is very dangerous for the kid. It is understandable if he is finding it hard to balance parenting and work-out sessions, but there can be no excuses for using the baby as a CrossFit prop.
If there is a slight benefit of pulling off something as alarming as this, then it is the fact that the kid is getting exposed to the rigor of exercise at an early age.