Hunting
If you think about it, it's pretty easy to figure out why hunters die all the time. The whole predication of the sport (in modern years) revolves around walking through the woods with a loaded weapon and potentially shooting anything that moves. All too frequently, the thing that moves just happens to end up being a person.
Taking Preventative Measures
Hunters stress the importance of learning gun safety and practicing the sport as safely as humanly possible. You're supposed to wear alert orange on top of your camo so other hunters can spot you. However, roughly 75 hunters die per year because of hunting accidents caused by their own or someone else's gun.