Just before I left my car to walk to the Parkway path, I saw lots of ducks fly up from the Jordan River. I thought to myself, "Strange. Must be something in the river." A few minutes later two men came up from the river carrying a Kayak. As I walked past them to the Parkway path, I was tempted to ask them how far they had come on the river, but I didn't ask.
A couple of years ago, I saw a Kayak floating down the river with nobody in it. Unless the owner of the Kayak recovered his lost boat, that was an expensive trip on the river.