Be careful out there Wii owners! The Sun is reporting that 10 Wii users per week in the UK are being hospitalized. Doctors are saying that patients are reporting excruciating pain in their shoulders and knees. This Wii-itus and Wii-Knee are being caused by making sudden movements such as in the tennis game and in Wii-Fit. Potential problems later in life for Wii-itus sufferers include rheumatism, arthritis and inflammation of the shoulder or wrist. The best way to combat a potential Wii injury? Stretching. (or PS3).