A slight expansion on that incident:
I don't recall that it was ever said he was drunk like a previous poster said.
The man had gotten out of his log in the bee cave, and was standing on the left side of the flume near the Brer Fox and Brer Rabbit figures.
Reports said that there may have been a stoppage of the ride with the "trouble downstream" recording playing, but it was unclear whether this man caused the stoppage or if he simply exited his log while it was stopped for a separate reason.
He then tried to cross over to the marked exit on the opposite side of the flume by climbing across the back of a log that had stopped at the hold point at the top of the drop out of the bee cave. While he was crossing, the log was advanced into the drop, and he fell into the water and was pinned down by the next log.
When we went on the Keys to the Kingdom tour (a few years before this incident) our guide had brought us over to where the big water pit is behind Splash (there's railings and everything, but it's a LOT of water and the pumps are very powerful). He said that at least once a day in the busy season there's a ride-stoppage for a Guest who gets out of the log. And if they should happen to exit out through the emergency exit right next to the water pit, the pumps immediately shut off, and it gets eerily quiet back there.
-Rob