[jumpy]

I should imagine that under the circumstances of sudden and catostrophic implosion, quite a large amount of heat would also be generated in (what was left of) the submarine atmosphere (like you get pumping up a bicycle tire- the pump gets hot) and any crewmembers in said atmosphere would not only be subject to the intense and crushing pressure differential, but a rapid and extreme buildup of heat- a kind of 'compression ignition' of the air in the boat- something which would only last for a fraction of a second, but might actually do it for the crew before them being crushed to death?

I'm guessing some of that is at least possible if not wholely probable in such an event as a submarine implosion... yay discovery channel!