A guy was peeing off the back of a boat while out fishing. The others looked back and he was gone. They could see him in the water, but the ten foot waves prevented them from reaching him before he drowned. Superior is a wicked and cold lake. This story was near Munising, Michigan many years ago.
On a map Lake Superior looks like an angry wolf. More ships lost in it than the other Great Lakes combined, IIRC.
I read some statistic a while back that said something like 70% of male bodies that died by drowning in lakes had their trouser zipper down when they were recovered.