In the scene where Wayans character has just beaten up Voight's character in the elevator. He grabs his bag and gets away, he makes it to the top of the roof, he is the cornered. He turns around and faces the military baddies, he puts his hands up and his bag is clearly visible on his shoulders. The shot goes to the baddies, then back to him, his hands are still in the air but the bag isn't on his back. The shot then goes back to the baddies and somebody asks him to throw the bag over to them. It then appears back on his back as his he takes it off and throws it to them.