The box office got a much needed shot of adrenaline this weekend as two fan favorites battled it out for tops. In the end, the combo of Jackie Chan and Jet Li in the family-friendly PG-13 Forbidden Kingdom proved too much for the latest gross out comedy from the Apatow gag, Forgetting Sarah Marshall. Kingdom ended up with a $20.8 million take while Sarah Marshall took in $17.3 mil. Last weekend's top flick, Prom Night, took the third spot with $9.1 million while the weekend's other major new release, the critically lambasted Al Pacino starrer 88 Minutes, made $6.8 million for fourth place.