[mkhaytman]

I've done this once, in one of the tanks with a latch described. It's interesting, sure, but its also really uncomfortable in there. The air is super humid and thick, it's almost difficult to breathe. I'm not ever claustrophobic, but I had fleeting nervous thoughts of being stuck in there. Overall I'm happy I did it once, but I don't think I'm willing to pay the price to do that to myself very often.