Wanna bet? It's done every day at the various Air Force hyperbaric chambers. Been there a few times myself.

I’ve been there too and nobody in my class made it past 6:36.......and those 2 guys were so whacked out of their minds that they couldn’t sign their own name to the paper....maybe your class was full of studs....maybe we were at 30k...the card I got says 25k.