Continuity mistake: Martin McNamara calls his brother at the beginning of the movie and tells him he'll be ready in two minutes. When the camera cuts to a new shot, his grip on the phone changed entirely.
Continuity mistake: Standing up, Cheung bumps the rather oddly light desk, and his commander gets his nasal stick up the nostril. Brief cut to Cheung, and the coffee cup which was standing straight earlier toppled with a delayed reaction. (00:44:25)
Continuity mistake: In the hotel Christopher Walken attaches the chain lock on the door. Camera angle changes and it is not locked, then locked again when the shot changes back.
Continuity mistake: When the robots are chasing the girls, the girls are all carrying make-shift Molotov cocktails made out of petrol cans with a rag in the neck. Suzie is hit in the leg by a robot and falls to the ground. The robot then fires a laser at the petrol can by her, causing it to burst into flames, which cover her too and burn her to death. However, when the camera pulls back, we see that her petrol can is mysteriously intact and untouched by the flames.
Continuity mistake: To reach Poirot, Hastings walks through the Acapulco airport with two ladies (one with a white jacket, light blue skirt, updo, carries a large brown suitcase, and another one with short hair, glasses, white trousers) that are both in front of him AND behind him, depending on the camera angle. (00:01:30)