Awww - I wonder if that stings as much as a belly flop does for us. Probably not with all that fur and I imagine he wouldn't be so keen to do it again and again if it did.
At the end where he's still moving his legs in a swimming motion even though he is out of the water - I had a beagle who would do that, it was so funny. You would just pop her back in the water and she would be off smoothly because she still had the motion going ...