Revealing mistake: Whilst being followed by Celine, Julie walks up a small flight of steps. When this happens, a blue car can be seen turning around a corner and driving past the camera. Just as Julie walks into frame, the driver of the blue car can be seen looking at the camera just as he drives past it. (00:05:58)
Revealing mistake: When Butt falls behind the suitcases, a mattress to soften the fall is visible.
Revealing mistake: When D'Artagnan and Rochefort are sword fighting on the frozen pond, both fall through the ice in separate places. As each one flails about in the water, it's obvious that the broken ice pieces are Styrofoam. It also appears that what is supposed to be snow covering the ice is ground up Styrofoam, too chunky to be real snow.