The rapids pass by those ledges on the downstream side of Havasu Creek's entrance to the river. If a person were to get too close to the edge, could fall in. This information should be drilled into all participants on a river trip. The river is very dangerous. If you fall into a rapid not wearing a PFD your chances of survival are very, very slim.
Last time I was down the river, I was rowing an 18-footer with a friend from Flag who has been a GC guide. He wanted me to try the somewhat tricky landing at the entrance to Havasu Creek. He said if I missed it, then immediately I had to set up to row the rapid just below the entrance. There is fast water at the entrance, you have to row really hard to get into it. So, I missed it. So, I quickly had to set up for that rapid. Did fine with the rapid.
Point is, it is all very fast water along through there. Not big rapids, but very fast, strong current. Best to wear the PFD when wandering around on those ledges if you are close to the river.
Sorry to hear about that man.
There is a point of no return unremarked at the time in most lives. Graham Greene The Comedians
A clean house is a sign of a misspent life.