Actually, I have heard rumors that many years back, a guide taking some folks on a fishing trip, forgot where he was in the river and went over the drop. All survived to tell the tale.
I can also verify that AT LEAST three crazy-as-you-can-be local Salida folks went over that thing in some duckies and kayaks to see if it was possible to run. They made it. Of course, don't use this as a reason to try and run it yourself! Personally, I'm so scared by that thing, I am usually paddling in the weeds on river left!