I knew a guy in A-7's who had a hook-point separation failure on a night trap and rode it into the water. He said he didn't eject initially because he wasn't sure of the aircraft attitude ( it was, as he said, a dark-ass night) and was afraid he would be out of the envelope. After entering the water, he couldn't get the canopy open due to the water pressure, so he pulled the lower ejection handle. Flight deck crewmen had thrown their flashlights over the side to mark the position and that helped orient him to which way was up. He swam towards the lights and was rescued. The underwater ejection had caused compression fractures in his back and after spending the night in sick bay, he was loaded onto a helo the next day for a long trip to the beach. At the last minute, it was decided there was a more serious injury to another shipmate, and due to fuel and weight considerations, they took him back off the helo and loaded the other man aboard. As the helo lifted off, it had some sort of catastrophic failure and crashed into the sea, killing all on board. They guy I knew eventually made a complete recovery, ended up being the CO of VA-105, and was T-boned in a car crash by a drunk driver, shortening his CO tour and ending his flying career due to head injuries.