Steep Creeking
You probably haven't heard of this sport, but it's really serious and it's starting to gain in popularity. Steep creeking is when you take a kayak on a rushing river that typically has some small waterfalls or some steep declines. People can get locked into their kayaks when they flip them, which can cause drowning, concussions, broken bones, and sometimes just instant death.
Is the Risk Worth the Gain?
Drowning is the most common killer among kayaking communities. Typically, the kayaker would get flipped over and slammed into a rock, knocking them out and potentially drowning them. Don't let that fact dissuade you though, it's important to make up your own mind about these kinds of things. Only 15 people die due to kayaking per year, so your chance of death is pretty low. Just don't do anything too gnarly.