You think Vin Diesel was cocky before? Just wait. The former bouncer's new spy thriller XXX opened at the top of the box office with $46 million. M. Night Shyamalan's Signs slipped to second with $30 million, followed by the debut of Spy Kids 2: The Island of Lost Dreams (No. 3 with $17 million) and Austin Powers in Goldmember (No. 4 with $13 million). Clint Eastwood's Blood Work opened in fifth place with $7.2 million.