By Jeff Jensen
Updated August 16, 2002 at 04:00 AM EDT

Jumping from the upper floor of an exploding casino, buddy cops Jackie Chan and Chris Tucker find themselves in the middle of Las Vegas Boulevard — a.k.a. ”The Strip” — as not one but two very big trucks rumble their way. To avoid certain squashing, they must lay back and let the big rigs pass over them. before Chan was willing to do all of the above for real. Tucker, on the other hand, is ”not known for doing his own stunts,” says visual-effects supervisor Kevin Lingenfelser. Since Rush Hour 2 director Brett Ratner wanted the duo in the same shot, ”bluescreen became necessary.” Chan and Tucker were filmed against the backdrop on a soundstage; the front rig of a truck was brought in to flash its headlights on the actors. ”The screams,” says Lingenfelser, ”were pretty authentic.” after While his colleagues at F/X house Cinesite used a technique called rotoscoping to cut Tucker and Chan out of the blue background, Lingenfelser accompanied a crew to Vegas to shoot the street action that would fill in behind them. Later, foreground and background were melded.