[naiad]

I don't know about barotrauma, but packing until it hurts is definitely not a good idea. It is possible to get hurt by overpacking. (And there's also the possibility of blacking out.)

Embolism is when a blood vessel is blocked, usually by a blood clot or by air which has entered the bloodstream. It is very serious and can be caused by barotrauma, such as when a scuba diver ascends while holding his breath.

Lucia