I did read somewhere (I don't remember exactly where) that when there is an implosion at great depth the air in the submarine is compressed so quickly that anyt

I did read somewhere (I don't remember exactly where) that when there is an implosion at great depth the air in the submarine is compressed so quickly that anything flammable (specifically human bodies, plastics, etc) would burn up instantly. So it's a bit like the explosion of the fuel-air mixture in a diesel engine.