Deliberate mistake: Just after arriving in the 21st century, Thibault and André enter an elevator and scare away its occupants. Attempting to chase them, the elevator doors close despite their attempts to keep it open. Elevators have a safety mechanism which opens the door when they encounter resistance. This was ignored deliberately in the film for comic effect.
Just Visiting (2001)
1 deliberate mistake
Directed by: Jean-Marie Poiré
Starring: Jean Reno, Christina Applegate, Christian Clavier, Matt Ross
Revealing mistake: When the security guard finds the wizard as he appears on the bed, the guard's reflection can been seen in the doorway. (00:43:10)