How's this for an unbelievable stunt: Jackass: The Movie — the big-screen adaptation of the late MTV series — debuted in first place at the box office with $22.7 million. Not surprisingly, young men accounted for half of the film's audience. The Ring slipped to No. 2, but cinched its sleeper status by actually grossing nearly $4 million more than last weekend. The Naomi Watts thriller took in $18.8 million for a 10-day total of $39.7 million. Rounding out the top five: Ghost Ship (No. 3 with $11.7 million), Sweet Home Alabama (No. 4 with $6.4 million) and My Big Fat Greek Wedding (No. 5 with $6.3 million).