Yeah, there was a fiberglass man's arm in the center of the whirlpool with a hat in the hand, going round and round in that whirlpool all day long! Good humor. The boat in the photo above is just about to enter the cave at the whirlpool. Today, the AP "log" would leaving the tunnel and entering the whirlpool at this point. The flow of water in the AP is reversed from the float trip days. At one point, there may have been a sign posted along the whirlpool warning boat passengers about the danger. I know this stock photo from SDC above had a caption that read "help this man out if you can as your boat passes by" in the 1970 booklet I have.