Thanks I left my backpack on a rock while we rested by a waterfall and took pictures. When we went to leave my backpack was gone. At first I thought somebody took it but my friend spotted an item from it floating down the river. It had rolled a good 30 feet down a steep incline into the river and managed to get wedged under a smaller waterfall. I did fall into the river trying to get it so I was wet as well, and this made my backpack weigh even more..at least this was on the way back, not on the way up, we already froze during the night I can just imagine how fun that would have been with all my clothes and sleeping bag soaked.