Continuity mistake: During the shifting gravity scene in the hotel room, Arthur rolls off the bed, catches the gun, and shoots the projection. As they slide towards the door, Arthur is curled up and facing away from the projection. But in the next shot, when we see them close up, Arthur is facing toward the projection and is no longer curled up.
Continuity mistake: In the beginning, after Nash dumps Cobb into the tub, Saito grabs Nash from behind, hits him, and then turns around and points his gun at Arthur. Nash is dry. But, in the next shot, Cobb jumps out of the tub and wrestles Saito to the ground. Before Cobb grabs Saito, it is shown that Nash is now soaked.
Continuity mistake: As Cobb is finishing describing how powerful a dream is, his right arm hangs down out of sight as his left thumb touches his forehead, then drops to rest on the table. A wine glass stands to his left. When the viewing angle reverses, his left arm is instantly hanging so that the hand is in his lap, and his right hand is bringing the wine glass to his mouth, yet the conversation is real-time continuous. (00:03:10)johnrosa
Continuity mistake: Just before the shifting gravity, Arthur walks out of the room and begins walking down the hallway. As we see him from behind, the elevator door opens and a projection is revealed. But, when the elevator doors are opening, Arthur slows down and just before we see him from the front view shot, his bead begins to tilt down. Then in the front view shot, he slows and tilts his head down again to avoid the projections contact.
Factual error: When Cobb arrives at Los Angeles International Airport and is going through immigration, the officer stamps his passport with a black stamp. All passport stamps in the United States are universally the same with a blue oval and pink letters marking the date in the center. Plus the fact that US citizens don't get their passports stamped when they return to the country.crisargentina93