I'm curious what the guy was saying as Ash and Buizel were first punching the waterfall. Whatever he said, he punched it, and there was quite the reaction from Ash (and Buizel I think). This was a pretty good episode. I'd like to see episodes like this where they work on learning/prefecting the move rather than "pulling the move out of its butt."
I have to say, the animation quality has been pretty good lately (aside from the stupid Pikachu error of last week's episode).