Turning around and looking upriver, or upsplit, was a bridge, and a lot of raucous water molecules whitewatering their way madly towards the edge of the escarpment.
And people want to ride this stuff in barrels? I guess it would be quite a ride. Once.
Yahooooooo!!! I bet there's a lot of dizzy fish in there.
And here's a video-clip of the whole sight...the rushing rapids coming down from beyond the bridge, racing down the stretch to leap over the edge of Niagara Falls. Wheeeeeeeee!