Visible crew/equipment: When Jacquouille is trying to drive the police truck, it's obviously a stunt driver in some shots because he wears a t-shirt.

Continuity: When he wakes up in the present time, Godefroy has nothing on his head, but when he wakes up Jacquouille, he's got a helmet.

Continuity: When Jacquouille gets frightened by the television set, he throws a statue in it, making the TV set explode. The blankets placed over the couches as well as various objects are sucked into the set. In the next shot, the couch right in front of the TV is still covered by its blanket, which disappears in the following shot.

Continuity: After Jacquouille arrives at Béatrice's house, she talks to him about Jacquard. Her hair band keeps disappearing.

Continuity: When the old couple is driving Jacquouille and Godefroy, the window of the driver's side keeps changing from closed to opened.

Visible crew/equipment: When Béatrice asks to Ferdinand Eusebe to prepare the potion, there's a shot behind a desk. The shadow of the crew is visible on the books.

Continuity: When Jacquouille throws the television set in the pool, the toys are shaking. In the next shot, the are only shaking a little bit and they shake a lot after that.