Ummmmmmmm.......(spoiler)

Yep he's cross trained as a medic he should have known how to do CPR. Rambo acted very out of character in this one.

I've been trained in CPR a few times recently.

God forbid I would be called on to use it ! I don't handle stress very well, so I don't know what I would do if someone actually had cardiac arrest while I was in the room. Probably freak out and freeze.

Just being honest.