So weird watching people swing a remote around... I mean, if they want to play tennis that way, why not go outside and actually play tennis? I bought a nintendo ds lite and know Nintendo do make great games... but I just can't get my head around it.
People swing controllers about all the time - we've all tilted a controller hard to the side to encourage a Mariokart to turn harder. Taking advantage of this natural tendency rather than ignoring it and wasting it seems like clever.
Looking at the guy swinging the baseball bat ... You know, I've swung a baseball bat and there's a lot of resistance against your muscles. Take that resistance away and you're liable to do yourself an injury.