An implosion is like an explosion, but in reverse. The hull fractures inward and upwards of 3,000 psi water pressure slams into every possible place, rupturing bulkheads, decks, and everything else in its path. It is not a slow leak; it's an extremely violent event. The usual result is multiple large pieces of structure and a large debris field of everything else.
Like squeezing an egg until it bursts all over the place.
