This made me laugh. The other day I was on one side of a short waterfall and a cave bear was on the other. He came across the river to attack me and was swept over the waterfall while standing up and swiping at me in full attack mode. Looked like he was surfing down the river!
Classic! Would have made a great video. Got to love a game where the physics allow such cool stuff under the right conditions.
Oh and after I stopped laughing I followed his red dot down the river and blasted him when he surfaced.