Yeah that was the evening of the DJ Ride, there was a few of us wandering the streets nearby in search of beer and BBQ food when we heard the sirens. Didn't take a look though. Earlier that day we saw some kids doing it at the Saluting Platform, aka Hot Walls. It's an insane place to do it, anyone who has seen it knows it's about 30ft high with a solid stone base under the water. The water very rarely gets high enough to even be able sto swim down there let alone jump off it, the only those kids could do it was by taking a massive run up and hope they landed far out enough to avoid hitting this stone ledge under the water. Eejits.