It may not have looked like a massive tumble, but Maksim Chmerkovskiy clearly injured something rather painfully toward the beginning of his Rumba with Kirstie Alley on ‘Dancing with the Stars’ (Mon., 8PM ET on ABC) this week. According to Chmerkovskiy, his “thigh just gave out.”

Source: http://www.tvsquad.com/2011/04/05/kirstie-alley-and-maks-fall-dancing-with-the-stars-video/