Ok, I need help understanding one of the deaths
So I was watching this program today for the first time and I've seen several episodes because there is a marathon playing... anyways... they showed a girl who was in some sort of chamber gas after being scuba diving and they said she somehow exploded but I didn't understand very well the explanation because English is not my first language so I got a little bit lost. If someone knows which one I'm talking about please explain. Thanks
BTW I think that the name of the episode was tanked girl...