In the years after the movie "Deliverance" came out, a stretch of the Chattooga River that had previously been know only to whitewater experts became popular. Deaths on the river became frequent. Oddly, most of the fatalities weren't drownings. Rather, people died of hypothermia after, for example, breaking an arm or leg after smashing into the many boulders in the river and couldn't get out of the gorge before nightfall.
Lots of folks died on the river because they didn't know what the hell they were getting themselves into.