It was a boat engine hatch much like the one seen below. It was open and the boat was being worked on when the hatch lifter suddenly failed sending it crashing to the deck. The problem was a person was in the way. It took two frantic and adrenaline driven men to manually lift the very heavy hatch off him. An ambulance rapidly transported the badly injured tech to the local hospital's emergency room.
The medical expenses are in excess of $100,000 dollars and still accumulating. He will be off work for at least three months or more recovering. As horrific as this accident was, the good news is his prognosis for a full recovery is likely, and had he been in a slightly different place the falling hatch could have killed him. When a hatch lift fails catastrophically while you're under it you either get crushed or the edges of the hatch act like a guillotine. This event has given me more than some cause for concern. On any given day this could easily have been me!