>>96716>wouldn't the air pressure under there be stupidly highNo. It's at 15 feet. At 30 feet or less, unless you stayed down for days, you wouldn't even saturate. Given that the dome they built needs the air manually replaced via scuba tank I don't think they're ever down long enough for that to be a problem. It could even be as deep as 115 feet before the amount of oxygen in normal air becomes toxic, although you would have to stay no more than 20 minutes or so and do decompression stops on the way up.
>and as one of the comments says, couldn't you fuck up your lung or ear or something. Your lungs don't care if they breathe pressurized air, within a reasonable range of pressures. The only danger is if you hold in a lung full of pressurized air and swim to the surface with it. The air would expand on the way up, rupturing your lungs. All you need to do to avoid this is exhale as you swim up. As for your eardrums, you simply pop them to equalize on the way up or down, like on an airplane.
