Nicolas Cage's new action movie Bangkok Dangerous has debuted at the top of the U.S. box office with a meagre $7.8 million opening weekend take.The remake of a 1999 Asian cult hit ended war comedy Tropic Thunder's reign on the top of America's movie charts.Ben Stiller's film slipped into second place in its fourth week on release with $7.5 million.Anna Faris' comedy The House Bunny rounds out the new top three.