In a good example of cascading events, the first-to-finish and overall winner of the recent Islands Race in S. Cal. came to grief following their finish.
In the dark night, and 24 knots of wind, with other Santa Cruz 70's nipping at their heels, they crossed the finish line south of Pt. Loma, only to find the spinny halyard lock would not disengage.
Coronado Beach lay a mile ahead. As they approached with spinny flogging and staysail aloft (staysail apparently wouldn't come down either.), the spinnaker wrapped around the forestay.
They tried to start the engine. A lazy spinny sheet wrapped so tightly in the prop the strut was forced upward into the hull and the prop shaft was bent. For unknown reasons, maybe water through the hatch, the starter and/or batteries caught fire. The electrics, lights, and navigational instruments went dark. The cabin filled with smoke.
The navigator radioed on a handheld VHF for assistance. The navigator, using his handheld GPS, also called distance off beach to his experienced, 10 person, crew.
The halyard lock disengaged unexpectedly, and the spinnaker dropped 20 feet before the halyard jammed. The navigator, standing at the bottom of the companionway, had his feet tangled in the tail of the spinny halyard and was yanked upwards, feet first, , injuring his knee, before luckily hanging up without further damage.
A customs boat showed up, but didn't know what to do. The CG requested a parachute flare be fired, to pinpoint location. This was done with trepidation, as the crew had no experience firing a flare in anger in the dark. During the next few hours, the boat was kept off the beach until dawn. I'm not sure how.
4-5 hours after finishing, the Coast Guard took the SC-70 in tow. The tow line apparently damaged the bow pulpit. The carbon main was left at full hoist, in case the towline broke. The main flogged itself, doing damage, as they were towed to windward, away from the beach, and ultimately safely into San Diego Harbor. A crew was hoisted aloft, and the spinnaker was cut off the forestay.
I wasn't there, and can't answer your questions or comments. Doesn't sound fun.