I once went on an inner tube race with an ambulance service I volunteered at.  We would get old truck inner tubes, over inflate them, tie them together and then float down the river with dozens of other teams.  One year there was a Naval frigate docked at a nearby harbor.  The officers on it apparently decided to participate in this event.  On their way down the river, their Captain fell over board and was rescued by one of our teams.  I bet they never lived that down.  He commanded a frigate, but couldn’t handle inner tubes tired together.

This was a fun event; that was until some drunks hopped into the river alone and proceeded to drown their impaired butts.  Because of this the local fire department that sponsored the event as a fund raiser was forced to cancel it in the future, since of course they were sued and no insurance carrier would now insure them.  Leave it to an idiot to ruin the fun for everyone else.  Not that my group was exactly sober, but we stuck together.  Being the dam was opened for this event, the water was very rough, thus increasing the fun.