As Bruce and Nicole are making out on the motorcycle, the setting abruptly transitions from midday to sunset when the camera angle changes.
When Donna's mother is abducted, a single shot to the torso of her bodyguard apparently triggered two squibs, leaving a distinct pair of blood stains several inches apart on his white shirt.
A flight between Hawaii and the mainland United States with a normal passenger load is well beyond the capabilities of both the Cessna Citation II flown by the villains and the Cessna 310 flown by good guys.
In the final standoff, Degas has a Luger pistol with a top-mounted laser sight. The Luger uses a top-mounted toggle loading mechanism that must flip up to function; the laser would make it impossible to load the pistol.
During the police station scene, Abe fires his pump shotgun twice without racking it to reload between shots.
When Donna shoots the airplane with the rocket launcher, the wire that held up the model is briefly but clearly visible after the explosion.
When Bruce, Donna, Nicole and Shane arrive in Nevada, the shot of their propeller-powered Cessna landing at the airfield is accompanied by jet noise.
Edy tells Cash "That gun is a 25 millimeter Beretta 950. You've had your 8, bitch." First, the Beretta 950 was available in .25 caliber, but this refers to inches, not millimeters; it is nominally 6.35mm caliber. Second, the gun holds 8 rounds in the magazine but also 1 in the chamber, for a total of 9 shots.