Continuity mistake: When Aguato takes a swing at Ace, Ace throws him down on the bug. There is no way he would have been in a position to do that, the bug was right at his feet.
Continuity mistake: In the opening scene, someone is crawling through the shattered rear windshield of Ace's car while it is in motion. They show a shot from inside the car and the guy has about half of his body in the car. When they show an outside shot, his hands are barely inside the car. Then, in the next inside shot, half of his body is still in the car. (00:04:50)
Factual error: When Snowflake is being stolen at the beginning, he makes the high-pitched noise that dolphins make even when he is out of the tank; those high peals are made underwater through carrying sound. He wouldn't sound the same out of the water as he did under it.
Continuity mistake: When Ace is showing Melissa the Almanac after he leaves Camp's house, his hand position on the book changes between takes.
Continuity mistake: When Finkle/Einhorn is stealing Snowflake, he has his hands on the side of the tank. Look at which finger his Championship ring is on. Then when he puts his hand in the water, it's now on a different finger.
Revealing mistake: When Ace Ventura is checking out the tank at Ronald Camps party (looking for Snowflake), as he's holding the fish over the water, whistling and saying "Here Snowflake", you can see the tip of the sharks nose, waiting to jump out of the water. (00:29:40)
Continuity mistake: In the scene where Ace is trying to find a connection between Finkle and Einhorn, there is a shot of his monkey walking along a mantelpiece to the right hand end. There are 2 photos in frames on the mantelpiece, one of which is right up against a heavy book that is flat on the mantelpiece. In the next shot, zoomed in on the monkey jumping on the book there is no sign of the photo that should be touching the book. (01:02:45)
Continuity mistake: In Ace's fight scene with Einhorn, he pulls her jacket down around her elbows, and she retaliates by kicking him in the groin. A split second later, her jacket is on properly again. (01:11:40)
Revealing mistake: When Ace's car flips over you can see the left wheel is elevated over the bush. If you look closely there is a wooden plank there to help the car lift itself over the bush. The other mistake in the shot is that there is no conceivable way the bush would have flipped the car. Unless there was something very solid in front of the bush, the car would have just gone right through the bush. (00:52:05)
Revealing mistake: After Ace loses the guys in the car chase who kidnap Dan Marino, Ace goes hurtling through the park in his car and smashes through a picnic table. Just before his car flips you can see his windshield is smashed but no holes through it. As the car flips over the bush there is a sizeable hole in the windshield on the drivers side. Its likely the hole was for the stunt driver to look through on the flip. Ace in his car has to keep his head out the window to see anything in front of him (because of the smashed windshield). On the flip the guy has his head in the car. Later on the hole has fixed itself. We see this as Ace is driving Dan Marino to the Superbowl the windshield is still smashed but no hole and throughout the film its made very clear Ace doesn't have the money to fix it up at any point. (00:52:05)
Continuity mistake: When Ace empties the filter from the water tank, he blows dirt off his hand to get a better view of the precious stone. He does not, however, remove all of the grime off his palm. In the close-up shot of his hand to visualise the stone, his hand is clean.
Continuity mistake: When Ace is talking to the dog in Roger Pedactors apartment (after his death), he picks up the dog when Einhorn approaches. As he is picking up the dog he places his left hand around the dogs neck. In the next split second shot his left hand is around the dog's body. (00:37:55)
Continuity mistake: At the beginning of the film when Ace is kicking the box down the apartment's hallway and he says, 'We're going downtown.', before he says that the box is up against the wall in a normal position, after the close up of Ace saying this, the box has moved to a different position. (00:01:50)
Continuity mistake: Near the beginning when Ace is in the parking lot of the stadium for the first time, there is a person walking in the background as Ace swerves his car. In the next shot, it shows two people watching him drive, and then when it goes back to Ace's driving, the man walking in the background is gone without having enough time to walk out of the camera's line of sight.
Continuity mistake: When he is in the aquarium tank (just after he says "I've got to, mister!"), he leans down with his glasses in his left hand. He's supporting his weight on his hands so can't move them, but in the next shot from behind his left hand's flat on the ground with no glasses in sight. (00:16:10)
Character mistake: Ace claims the stone he found is triangular cut Orange Amber from a 1984 AFC Championship Ring. The stones in the actual 1984 AFC Championship Ring were not triangular cut Amber, they were round cut Diamonds.
Other mistake: If Lois Einhorn is Ray Finkle, then how come Finkle has bigger fingers at the beginning, when Snowflake is being abducted, than he does in the end?
Continuity mistake: At the start of the film, the lift doors change colour from when Ace steps into the lift and when he steps out.
Suggested correction: Doors from the outside view are different on every floor, they are not moving up and down together with the lift.
Continuity mistake: When we first see Finkle's room, it's an inside shot and it's completely dark. But when we see the rest of the room, there is a "shrine" to Marino, with candles already lit. (00:49:00)
Continuity mistake: When Ace enters the bathroom at Camp's mansion, a towel falls to the floor from the door. However, when he exits the bathroom soaking wet, there is a closeup of his shoes and the floor and the towel is gone.
