Continuity mistake: The police officer is checking out of the mugshots of Pazzo's henchmen. In the close-up, his hands have as background on the desk papers that are not matching what's on his desk at the moment. (01:04:55)
Continuity mistake: The police are in front of Turnip and Binky's place (they live together, apparently); the detective leaning over the car trunk has his head lit by intense direct sunlight in the wide shot, but there's no such difference in lighting in the following view. (01:05:00)
Other mistake: When Turnip runs off with a horse suppository up his hindquarters, the policemen shoot at him being all in a straight line with each other - in fact it really looks like they should be shooting at each other if those guns were real. (01:05:55)
Continuity mistake: When Paul Sorvino is doing an odd re-enactment of Cinderella with Howie Mandel, the door of the Pazzo mansion is more damaged, with more bullet holes in it, than it was just before the police halted their fire. (01:17:40)
Continuity mistake: Round two of the police firing at the door of the mobster begins. After Denny's girlfriend shows up at the door, we see the police in an external view. To the left of the frame, you can see 2 officers with shotguns positioning next to the car, and two more, one with a rope on his shoulder, are arriving by the captain. In the next shot, the rope guy and his buddy are still arriving, but they are followed by cops with shotguns, which are going where there were already supposed to be in the previous shot, and missing now. (01:18:50)
Continuity mistake: When Dennis's girlfriend goes to see him at the godfather's house, her car is seen parked directly in front of the house, where the godfather's car was just parked moments ago. (01:18:55)
Suggested correction: Well, yes and no, or rather "no and maybe." The godfather's car was parked far enough from the stairs for another car to park closer, between Pazzo's car and house. And it's what happens here. However I do think there could be a continuity issue with one of the exterior shots when Pazzo's car seems to have been moved quite a bit off position compared to before. The mistake could be there but not as big as it appears to be (I kinda find it hard to judge due to the angle by how much really the car is off position, even, since it's a significantly different one from before).
Continuity mistake: When Ted Danson releases the cargo from the truck, in the POV shots we see a police car going straight ahead and being hit directly the barrels, but in the reverse shot the cars are turning before taking the full hit and are more distant before it happens. (01:21:45)
Continuity mistake: When the doped up Turnip runs past Binky, multiple takes have been sloppily edited together; Binky is giving Turnip a thumbs up in the first shot, then after a cutaway he is shown with his hands on the steering wheel, but taking one off to give the thumbs up, and finally he is again with both hands on the wheel. (01:22:10)
Continuity mistake: After the climactic car crash, the ladies rush to the car driven by the butler; Jennifer Edwards reaches the car a first time and is about to mount on it, but in the following view she is still running to it. (01:22:35)
Factual error: Spence says that Claudia is Italian, but the very efficient butler greets her with "Buenos dias", and according to Ellen she was a big Chilean film star. Nothing strange that Ted Danson would be wrong about her nationality like he often is wrong about names, but in the end credits we have a similar Spanish/Italian language mixup with an "Italian director" listed, when the person in the movie finale speaks Spanish. (01:25:00)
Continuity mistake: At the end of the movie, Spence is seen with Claudia in a western movie. He walks through the swinging bar doors with a cigar in his mouth. He takes a few steps forward and the size of the cigar has nearly doubled.
Continuity mistake: The damage to the front grill of Binkey and Turnip's first caddy changes throughout the car chase with Spence and Dennis from a small hole to half the grille.
Continuity mistake: When Spence's brother in-law almost crashes into Dennis' girlfriend's car, he's driving straight down the road and she makes a left from the intersection to cut in front of him, but when the camera angle changes back to the inside of the brother in-law's car the intersection that he should have just passed is nowhere to be seen.
Continuity mistake: When Dennis and Spence are trying to outrun the cops in the car that Spence stole from the racetrack, the camera shot from the inside shows them driving on a regular street with the yellow lines and everything but the camera shots from the outside show them driving on blacktop streets with no lines whatsoever.
Plot hole: The whole premise of the movie makes zero sense. Spence finds out that a certain race is rigged, but he is caught eavesdropping, so the goons are after him. They don't catch him and then the day after they stalk the betting counter looking for him. He then enlists the help of his friend Dennis to distract the goons so he can place the bet. But the villains are completely unaware about Dennis' existence! He could simply walk in and do the bet himself. He even is the guy with the money. No reason at all is given why Dennis does not place the bet himself, cash in, and walk away. Other than the fact that the movie would be done in 20 minutes and with not much of a payoff.