There has recently been a great deal of press coverage on the accidents that Ninitendo WII owners have been suffering. There has been many cases of accidental damage to expensive equipment, furniture, and even people. In one case a man playing a ten-pin bowling game accidentally let go of the controller and embedded it in the side of his TV.
Please see the following website
This is a Hand Strip for the Nintendo WII Controller. The had strip attaches to the Nintendo WII and controller and to your wrist, which prevents it from slipping out of the hand while playing.