Aah, thank you. I'm much more on board with the plan now. I mean, I did think about the exploding issue, but I wasn't sure how much gas a body produces versus how much air they had left (about 20 hours). But...I know jack shit about this stuff.

Also a very compelling argument you make is the whole pressurized vs airtight thing. If it has an automatic equalizing system (which would make sense) then they'd be screwed anyway.