What's Up, Doc? (1972) - 13 mistakes

Revealing: When the Chinese dragon is knocking over the trash cans you can see they are all perched at an angle on the curb to facilitate being kicked over.

Revealing: In the early part of the chase scene, when the person hanging the banner swings into the pane of glass, you can actually see it start to shatter before he touches it.

Continuity: At the airport Howard stands in front of a departure sign that says local time is 11:08, yet just a few minutes later Eunice tells Mr. Larabee that it's 12:05.

Revealing: When the sign worker falls off the ladder and swings down to break the pane of glass, his support wire is visible.

Revealing: During the car chase, the dump truck tailgate is closed when dumping sand onto the Cadillac. With the tailgate open, the sand would not have filled the interior of the convertible.

Continuity: When Bannister is first shown in the ending scene aboard the TWA plane there is no seat in front of him.

Continuity: Bannister's name tag shifts position onto and off his lapel during the Larabee banquet.

Continuity: When the reporter leaves the airport terminal with the document bag he gets into a Yellow Cab number 710, with no billboard on the back. When he exits it is still 710, but there is a billboard on the back of the cab.

Visible crew/equipment: There is a boom mic visible when Eunice is arguing with the badge lady over her identity.

Continuity: During the chase scene the sheet of "glass" carried by the workers is too flexible, and is probably a sheet of plastic. The sheet that breaks is not the same sheet that is set down on the sidewalk; the (white) worker's upper suction cup is on the ladder side, but when the sheet is broken it is on the opposite side.

Continuity: During the chase scene the sun visors on the stolen VolksWagon are visible in some scenes and apparently removed in others.

Audio problem: About 10 minutes into the movie, Howard and Eunice are standing at the head of the hotel's escalator listening to Judy define the word "propriety" as she descends; instead of diminishing in volume as it ought to, the volume in this speech stays the same and even increases a little right at the end.

Continuity: When Judy Maxwell approaches the front desk near the start of the movie, signs above where the room keys are kept indicate that the hotel only has 19 floors, with most of the film's action taking place on the 17th. However, when Howard gets in the elevator the next morning (after the visit from Kaltenborn), the elevator starts at floor 31, going up to floor 33 or so before coming out on the unfinished roof restaurant.