It's horrendous to think what might have happened to the "party goer" at 3 30 in the morning. It would be a very fortunate thing to find the remains in one piece.
It's not the sharks I'd worry about. The ship's props cause a gigantic sucking action and will take in anything and eject it at the rear.
Here's an interesting read. Let's go back to the 42,000 ton Titanic when she was pulling out of Southhampton. Inching at a very slow speed out into open ocean, the sucking action of her huge props actually yanked the Amerika from her mooring lines and Titanic was in grave danger because the Amerika was being pulled and sucked towards the Titanic and a collision seemed iminant. untill Master E.J. Smith reversed the engines, causing the reverse action. Pretty cool eh?
So let's come back to the Carnival Ship. Twice as heavy, going at full speed with a 150 lb man overboard
If the waves here high combined with the water that the vessel forces away from it's hull, I'd hate to be under that wave.
And in the darkness of night yet. God rest his soul.