Crossing Crystal Falls

The Swift River crashes down Crystal Falls, and there's no bridge.
Nudge 1Where to look
Watch the falls for a while: something big comes down the water, again and again.
Nudge 2A stronger push
A log rides the current. Get on it and it carries Dizzy across, either way.
Show the solutionThe whole answer, with a video
Wait at the edge for the log, jump onto it as it passes and ride it to the other bank, then jump off. Do the same on the way back. Watch your energy: the water hurts.