Other mistake: When the parent monster is just about to enter Piccadilly square, for a brief moment a view of a bus is shown. The writing on the bus is reversed.
Continuity mistake: During the scene, when Natalie Wood goes with Toots to make-out point after the dance and jumps in the water, it's supposed to be late at night. When they cut back and forth between shots at the waterfalls and Warren Beatty waiting for Natalie on her porch, all the scenes at the falls were shot in broad daylight, while the ones of Warren on the porch are at night.
Continuity mistake: Doris picks up the phone and there's a cutaway shot on Johnny playing his guitar as he listens. The stockings Doris tossed at him are gone from the guitar head, but they are back when the phone call is over. (00:05:10)
Revealing mistake: When the two gangsters open the car trunk to move the bagged dead body, it moves during the duration of the scene. (00:28:40)
Continuity mistake: The trees outside the court windows (behind the Judges) change places.
Audio problem: As Tom and Mary exit a home that faces the town square, the sound of applause is heard even though almost all the townspeople are holding glasses of lemonade and nobody is clapping.
Other mistake: Brian Keith sneaks into an Indian encampment at night while they are sleeping. In order to stampede their horses, he rapidly fires the one and only six-shooter revolver he has into the air...eight times.
Continuity mistake: When the Coyote tests his dart bomb, he lights it with a match in his left hand. But when he throws the dart bomb in the next shot, the match that was in his hand has gone.
Continuity mistake: When Mr Stringer picks up Miss Marple from Akinthorpe Hall in his car, Alexander, as a harmless joke, has tied a string of old shoes and empty cans to the car and put a sign 'Just Married' on the back of the car. As the car first drives off, the sign is seen falling away, but when we get a different shot, the sign is well secured.
Factual error: Delilah is shown stirring a pot of ears of corn. Corn was not known until native Americans introduced it to settlers in North America in the 16th century.
Continuity mistake: When Sylvester sees the Daily Bugle newspaper, the front cover headline reads "Police Hunt The Cat." You can see the words THE CAT have nothing around them, but when we see a close-up of the newspaper in the next shot, inverted commas have suddenly appeared.
Continuity mistake: When Yeggs Benedict puts the dancing cloth over Inspector Willoughby whilst he is entertaining him, Benedict has nothing on his right arm, but when he attempts to take away the Red-Eyed Ruby in the next shot, two bracelets have appeared.
Character mistake: The registration number of the stolen van is GPW729 but every time it mentioned in the dialogue it is stated as GPW927.
Continuity mistake: When Sylvester and the dog realise their legs have been connected by a pipe in the junkyard, the position of their feet changes between shots.
Visible crew/equipment: As the man walks down the corridor, before being asked for a match, on the left wall there is a shadow of the boom, and briefly the sound man holding it. (00:16:25)
Visible crew/equipment: While approaching the two test pilots in the hanger, the shadow of the camera can be seen on the lockers. (01:31:00)
Continuity mistake: When Carol and Jerry come out of the water on their day at the beach, they sit at the foot of their beach chairs to dry off, then lay back. Miraculously their towels are spread out over the chairs.
Continuity mistake: When Sylvester has caught all of Speedy's friends, he puts them in the bottle and he is holding the flute in his hand. But when see Sylvester a little later on, the flute has gone, and after Speedy has rescued one of his friends, Sylvester has the flute again.
Revealing mistake: The Son of Hercules brings to the nearby village the old man that died on the beach. You can see the 'corpse' move his arm to assist Mark Forest as he dismounts him from the horse.
Continuity mistake: Chet visits his friends that are playing poker. He falls asleep and wakes when he hears the news on the radio. The band aids on his wound change abruptly position in close-up. (00:12:10)