Continuity mistake: When Romeo and Juliet are in bed and Romeo playfully pulls the sheet up over his head, his shirt gets caught in the sheet and ends up over his shoulder and around his neck, but in the next shot from the side, his shirt is down.
Visible crew/equipment: When Bill's fiance is driving over after the first tornado, when the truck lands, she swerves and she stops. As she is getting out, a camera is visible. When the camera backs up though, a crew-member pulling it back is visible in the door.
Revealing mistake: When Arnie jumps from the plane, notice the stunt double. He weighs about half of what Arnie would, and has no muscles. (00:55:10)
Continuity mistake: Early in the film, Michael talks to Harry Boland on a boat. During this scene, a cigarette appears in Boland's mouth that was not in the previous shot. (00:40:40)
Continuity mistake: When Waldman is telling his wife Alice how disgusting her dog is, the way he holds his spoon keeps changing between cuts.
Continuity mistake: When Jennifer Tilly is thrown down on a bed wearing a black leather jacket, she sits up immediately and in that shot she isn't wearing the jacket. Very obvious.
Continuity mistake: Before Draco lifts up Bowen his grip on the cable changes between shots.