Yes, it was at the water, and his pastern went, Ardross. The water jumps don't kill anywhere near as many horses as sloppy hurdling does. There are probably more deaths in Bumpers, in fact, because there aren't that many water jumps left to take. But I don't hear clamour to ban those events.
Horses should be capable of jumping most reasonable obstacles, although they'd only jump in their natural state to find better grazing, a mate, or to escape predation. We are already putting them through an artificial process every time we put them onto a racecourse, into a jumping arena, or pulling carts - in fact, in every aspect of human use. But as they can jump, there's less reason to abandon water than the far more artificial open ditch. If we don't want to risk them at all, we shouldn't use them in any context.
You have only to watch a few rounds by eventers to know that a water jump is a piece of piss - of course fatalities occur at them occasionally, but they occur at the ditches and the uprights far more often. We went through this exercise (where were you?) a couple of years ago, when the issue was debated, and out of over 300 NH fatalities in one year, only two were attributable to dropping into the water. Put that into the context of the thousands of runs (horse x races per year) and calling for the water jump to be dropped is a vast over-reaction.
Once again (Shadow Leader prepares her crossbow) - look at French chasing. A wonderful, interesting variety of obstacles which engage both horse and rider far more than our dreadful rote of upright, upright, upright, open ditch, upright, upright, upright, open ditchzzzzzz... oops! And one water! Jeez, it's a wonder any of our nags want to go chasing after two seasons at it. I am sure that many 'mistakes' are no more than falling into comatose boredom with the sameness of it all. That doesn't happen in eventing - courses are never the same, internationally, from year to year. Maybe that's why, facing immensely challenging obstacles at speed, eventers keep going into their late teens, even up to 20 years, without dying at the rate of our chasers?