Lori: Sweetheart, be reasonable. After all, we're married.
[Quaid shoots her in the head.]
Quaid: Consider that a divorce.
Doug has the hologram when inside the alien nuclear reactor, and a bunch of bad guys encircle the holographic image and fire at it at point blank with automatic weapons, and not one bad guy gets hit. If they encircled the 3D image, at least a few bad guys would have been hit by their own men.
Arnie was injured twice during the making of this movie. He cut his hand badly while smashing a train window, and broke a finger during a rehearsal of the hotel room fight scene.