Continuity mistake: In the wide-angle shots of the blue Willys (Jeep) wagon, the windshield is a 2-piece version with a vertical divider in the middle. The close-up shots don't have the divider.
Continuity mistake: In the scene where Dick Shawn and all the characters find the box of money under the big W, Shawn has just thrown Jonathan Winters out of the hole so he would have room to work. But in the next five edits, Winters is both in the hole helping Shawn struggle with the box and is also shown standing outside the hole observing himself along with the others.
Continuity mistake: In the last scene when they are all on the fire escape, there is one part where the landing nearly collapses and Sylvester is seen nearly flying off the landing. The next immediate shot shows Sylvester fighting for the ladder. He apparently climbed up the landing and crawled over a bunch of people in a fraction of a second.
Continuity mistake: About three quarters into the movie, Sylvester, in his red '62 Dodge Dart convertible, sees brother-in-law Russell Finch and Mr. Hawthorne drive by in a '61 blue Chevy Impala. When Sylvester does a u-turn to give chase, you can see the passenger side of the Dart is already caved-in. A few moments later, when he rams the Dodge into the Chevy, kind of Ben-Hur chariot style, is when the initial damage should have occurred. Evidently, the chase scene was filmed out of order. Also, prior to the chase, the Dodge is shown primarily from the driver's side, perhaps to conceal the damage on the passenger side of the car.
Continuity mistake: When the fire engine escape ladder begins swaying out of control, the actors and stuntmen are never in the same place on the ladder from scene to scene.
Continuity mistake: In the scene near the end when everyone piles into the two cabs, Mr. Pike is refused entry a few times, but finally squeezes in on the left side. When the camera cuts to inside the cab, he is second from the right. There is no way he could have slid past Sylvester and the English guy.
Continuity mistake: While in the airplane, Sid Ceasar smashes the windshield and other parts of the plane attempting to squash a bug; when they land, however, the plane is intact. (01:08:19)
Continuity mistake: In the scene where the Imperial gets hit from behind, Ethel Merman fails to get her legs straight up in the air on the initial impact and as a result sticks them up after she's already knocked over.
Continuity mistake: The two taxis collide and get dented when turning around at the Captain's house. During the subsequent chase, the damage has disappeared.
Continuity mistake: During the opening scene, Smiler passes Milton Berle, loses control of his car, crashes through the barrier and up the ramp. However, when Berle et. al. stop at the spot where Smiler supposedly left the road, the two spots don't match. The broken guardrail where Berle is standing is not the same spot where Smiler broke through. The second spot is roughly 100 ft. up the road from where the car went "sailing right out there".
Continuity mistake: When the Crumps, Meyer, Ding and Benjy are in the taxicab just after leaving the park, Meyer looks out the back window to notice Culpeper driving in the opposite direction, so he yells "Hold it" to the driver. The driver then starts to turn towards the right so that he can park on the sidewalk. Whilst the driver is saying "Can you see him", the taxicab is in the middle of pulling over and is still driving. It then cuts to a shot of Culpeper driving, and towards the right hand side of shot, in the background we can see that the two taxicabs have fully stopped. (02:22:03)
Continuity mistake: When Ding and Benjy are in the taxicab on their way to the park, just after they see the Crumps in the taxicab in front, they tell the driver to pass the cab in front and that they want to get there in a hurry. At this moment, Ding is shown sitting inside the car. But in the next shot, when the two cabs are shown from outside, Ding's arm is suddenly hanging outside the window. (02:01:58)
Continuity mistake: When Melville is launched from the ladder and down through the stairs in the apartment building, he is shown landing in a gap between the stairs. In the first shot, he is shown putting his hand on the bottom step of the stairs. A closer shot of Melville is then shown where his hand is now placed on the second step. (02:36:08)
Continuity mistake: Just after Culpeper flees from the garage he attempted to hide his car in, the others get back into the two taxicabs. As they do this, Culpeper's accomplice Jimmy is shown putting his left on the taxicab in front and begins pulling his hand on the cab just as the shot ends. The camera then changes angles and his left hand is now shown pointing towards the right. Something he was not doing at the end of the previous shot. (02:24:34)
Continuity mistake: When everyone gets back into the taxicabs after discovering that Culpeper has driven off with the money, the area that the two cabs are positioned in is shadowed, but as the cabs begin to drive in the following shot, the same area is now covered in sunlight. (02:22:35)
Continuity mistake: When Culpeper is about to get into his car before leaving the station, he looks back at the police station for a brief moment. In the first shot, his left hand is shown touching the right hand side of the window frame. But in the next shot, where the cop says "What's the matter, Chief", his left hand is now shown the bottom of the window frame. Then it is back to being alongside the window frame in the next shot. (01:55:52)
Continuity mistake: When Ding and Benjy are on the verge of landing, just as Ding says "Put on the brakes" and Benjy asks "Where are they", Ding is shown putting his right hand on a couple of levers. When the shot cuts, his right hand is suddenly pointing towards a restaurant. (01:58:56)
Continuity mistake: After Culpeper bets they'll turn to the crossroads and turn south, the scene cuts to an overview shot of the four vehicles driving. In the shot, Ding's car is shown in the middle of the road and Finch's car is shown on the right hand side of the road. In the next shot, Ding's car is suddenly on the left hand side of the road and Finch's car is now towards the middle of the road. The shadows also change direction between shots. (00:32:55)