
The Wii allows players to interact with the console by swinging the controller, rather than just pressing buttons. The 'Wiimote' features a motion sensor, allowing players to recreate actions such as playing tennis.
However, sites such as Wii Have a Problem have documented incidents in which gamers have lost their grip on the remote and ended up destroying TVs or other goods.
"Some people are getting a lot more excited than we had expected," Nintendo president Satoru Iwata told Associated Press.
"We need to better communicate to people how to deal with the Wii controller as a new form of entertainment."
Nintendo's latest console launched in Europe last night and sold out in minutes.