Yes I made assumptions, but I think I am pretty capable of assessing the situation and I will continue to use my discretion in these situations. The kid could not have been in a more conspicuous spot on the river. He might as well have been wearing a big neon sign. Cell service is spotty in the area and I would have had to drive a few miles to make a call. If I had called the TIP line, he probably would have been long gone by the time they responded.