2008 Kailua-Kona Ironman Swim Start

Not much here but the the madness of 1000 swimmers or so starting simultaneously from a fixed position. This start looks more aggressive than the Dwight Crum Pier to Pier race which takes up to a 1/2 mile to sort out your own personal space. I feel races with a 1000+ swimmers should be staggered if the start is placed in such a confined location as we see here but what do I know?