lol i actually cant control myself when playing any game really. like if im racing or in a car turning ill turn with the direction im turning into. when im shooting ill make gun noises and shake the controller. when im running from a grenade ill like jump up in the suspense of did i make it or not.

but yeah i dont know why...i just do :p

the only time I ever did that was in Metroid Prime 3 and actually disconnected the Nunchuck and Wii Mote

I've found alot of my friends prefer the GC controller for mario kart, because they turn the wheel too far (im meaning close to 180 degrees)

Playing Wii Sports = fun.

Playing Wii Sports and going nuts = very fun.

Playing Wii Sports and going nuts with mates = extremely fun.

Playing Wii Sports and going nuts with mates while drunk = fucking amazing.

i think reason for that is the wii mote ;)

Also, it can just take time to get used to it. I just got WiiFit, and I'm terrible when it comes to the balance games; I bend waaay too sharply. I am assuming that will get better as I gain more control over my balance.

A similar thing may be happening with the people you're talking about.