Wild Ride in Mother Rapid in an innertube raft

Ty Childress took this photo:  “I took this photo while working for Bryce Whitmore, Wilderness Waterways. Our camp was on Otter Bar across from the cement quarry. I saw this group of pranksters floating by camp, grabbed my Pentax, and ran downstream to the bottom of Mother Rapid just in time to grab the shot. Why did I think the guy second from the front on right could be Ken Kesey?”