When Nick and Frank pull up to ATC, the red Corvette is parked diagonally beside the blue car. But when Frank gets out, it's parked straight.
When the airplane stops, Nick lurches forward in his seat, and the left wing is visible out the window. The angle immediately reverses to outside the plane, and both wings are totally buried in hay.
DeCosta's legs are obviously spread to allow Nick a place to stand, and Nick's footprints are visible in the comforter from previous takes.
When the airplane pilot is shot, a bloody hole appears in the windshield. After Berzak grabs the plane controls, the windshield is magically restored.
The helicopter would not have enough air speed to catch up or keep up with that twin-engine plane.
When the blonde returns DeCosta's serve, another ball is bouncing in the lower right as he runs away from camera.
When Berzak sits down in his apartment to eat a raw steak out of its packaging, there is a shot of him chewing before he has opened the packaging.