Revealing mistake: When the Penguin is sliding down the zip line, just before he hits Batman you can see Batman throwing a punch at nobody, he is swinging at empty air.
Revealing mistake: Near the end of the film when a building is collapsing and people are running to escape the falling debris, several women along with James Coburn are running up some stairs; a block of cement falls and hits actress Gina Golan right in the head. Instead of killing her on the spot, the bolder merely bounces off her head and she continues running up the stairs. (01:40:55)
Revealing mistake: When the Grinch is cutting Max's antler, the cut lines appear on the prongs before he actually starts to cut.
Revealing mistake: All four of the Dachshunds in this story are supposed to be female. During one part of the picture, when they jump on the bed with Suzanne, you can see that at least one is male.
Revealing mistake: When Alfie (Michael Caine) goes to the dry-cleaners, he starts kissing a woman. He has a grey suit on and he comes out wearing a blue suit, being a comedic trick. But, when the guy in the grey suit goes behind the clothes rail, you can tell it is not Michael Caine, as his hair is shorter and blonder than Caine's.
Revealing mistake: At the very end, Belle is replaced on the horse by a very obvious dummy wearing a dress, just as the Rumpo Kid jumps onto the saddle.
Revealing mistake: After Luther faints from seeing the shears in the painting of Mrs. Simmons, the beam of light from his flashlight continues to move side to side, but Luther's flashlight is in his hand, unmoving.
Revealing mistake: When Sir Rodney leaps from the banister onto the chandelier during the fight at Chateau Neuf, it is not Sid James but a stunt double.
Revealing mistake: At the end of the car chase when the two cars collide, the cliff shown to the right is a painting added to the scene to suggest a sharp drop off.
Revealing mistake: At the Halloween Party, a girl with a green dress says to Charlie Brown, "Charlie Brown, you'll have to model for us." When she says this, she suddenly grows a third hand, then she has two hands again a little later.
Revealing mistake: A safety wire is visible as Grandpa hits the low tree branch that knocks him off his horse.