I'd be curious to hitch him to diagnostic devices when he's meditiating. Who here wants to bet he's pushed his metabolism half way into hibernation or better, and what he had was enough to keep him running.

Me, I'm stoked when I can think my pulse down ten beats in 60 seconds, but there are people who have been documented as going to some ludicrously low physical states when meditating. It might not be that different from the state people go into when they go into super cold water and just shut off, but with an alarm clock.