I think it's pretty exciting ... but I really fear that someone is going to get seriously injured on one of these capsizes. I've seen a lot of people barely hanging onto the upper hull and one day, someone is going to fall on the (previously) underside of the hull and land on the hull in the water...that's a long way to fall. Look at the guy in that video that fell on the safe side - that's a LOOOOONG way down to the water. Imagine slipping off the other side and landing on the opposing hull. As for the guys monkeying on the trampoline, at least the mast hit bottom :-)
I wonder if some short lifeline might be in order...like 1' long that extends horizontally from the hull about 6 to 12" down from the deck. It would really give folks something to hang onto when the thing goes over.