Didn't say stop his heart. Said his pulse. There are ways to cut your pusle off "at the pass" so to speak. I've heard a couple of different ways but never been able to figure it out.
Yeah, it's moving something somewhere to slow down then eventually stop the pulse. I don't know but, I should know everything about it tomorrow.
It's not nearly as cool... but if you put a tennis ball under your armpit and squeeze then you can stop the pulse in your arm... have someone feel and then release a bit.. and it starts up again.
Be sure to let me know. I've always been interested in that. Just haven't ever figured it out, really.