Continuity mistake: When the Mask crashes Nico's party at the Coco Bongo, Nico shoots him. According to the sounds, the gun should have flashed 8 times but it only flashes 2 times. (01:18:25)
Continuity mistake: When Dorian's boss shoots him in the stomach it switches from the boss to Dorian several times. Each time Dorian's buttons change colours from black buttons to white buttons to no buttons. (01:18:25)
Continuity mistake: When Tina kicks the mask out of Dorian's hand and Milo leaps through the air to catch it, he catches it with his mouth at the mask's chin, yet when he lands the mask has been turned round so the chin end is now facing the ground. (01:22:45)
Visible crew/equipment: Towards the end of the film you see the long haired baddie grab Milo by the hind legs (just before Milo puts the mask on). As Milo starts to change you can just about see the baddie who is holding his legs, except he is now a different person with brown curly hair, nobody who is seen prior or following this shot. Presumably he is the dog trainer. (01:23:15)
Continuity mistake: In the bar scene at the end of the movie Stanley dives over the bar while Dorian's thugs shoot at him, when they stop shooting you see one of the thugs drop the magazine out of the gun then the scene cuts away from him and when it cuts back you see the thug drop the magazine out of the gun again. (01:25:20)
Continuity mistake: In the club when Carrey is being shot by the goons when he's behind the counter, he jumps over the counter. Just before he jumps on the counter, you can see those were two separate takes. Pay close attention to the head on the left. (01:25:30)
Continuity mistake: When Stanley is beating up Dorian, Dorian's head is either lying against the ground or raised, depending on the shot. (01:27:49)
Revealing mistake: When The Mask is dancing with Tina and he turns her into a human tornado while spinning her around, none of the onlookers in the crowd show the slightest bit of amazement at the impossible feat that just occurred in front of them, indicating that the extras were not directed to react to the special effects.
Revealing mistake: When Kellaway shows up at Stanley's apartment to question him about his pajamas and Stanley scrambles to stuff all the stolen bank money into his closet, you can see that a few of the bills are blank on the back side, revealing that the money is a fake movie prop.
Continuity mistake: When Stanley wakes up after his second night as the Mask, he is holding the mask. In the next shot, the mask has moved further up onto the pillow and Stanley isn't even touching it.
Continuity mistake: When The Mask is being frisked at the park the cops find a picture. Kellaway holds it with one hand, but in the following shot he is holding it with both.
Audio problem: When Tina is tied to the palm tree with the bomb armed and Ipkiss is fighting with the goons. Ipkiss fights with Dorian and punches him over and over with Dorain on his back. The punching sounds are VERY obviously off from the action.
Revealing mistake: When The Mask dances with Tina for the first time, after he swings her around the floor you can see the stunt double's face, older than Cameron Diaz.
Revealing mistake: In the alley, The Mask tells one of the street thugs that he's going to pull his underwear over his head. Here you can see that The Mask's rubber 'skin' is peeling up on the back of his neck.
Continuity mistake: When The Mask paints the flush handle, near the end of the movie, watch the far left hand side when it shows Tina and The Mask. The Mask is shutting a door on the tree where the flush handle really is.
Continuity mistake: When Dorian dismisses his charges to capture the Mask for 50,000.00, Tina and Dorian chat. She is about to light her cigarette but doesn't. In the next cut away there is smoke in the air but she still hasn't lit it yet. As the scene continues you only see smoke when Diaz has her back to the camera.
Continuity mistake: The "loaner" car Stanley picks up at the mechanics is a 1951 Studebaker Champion. However, the car that falls apart on the bridge is a 1950 Studebaker Commander.
Revealing mistake: They put the explosive down near the end and open it with a crowbar. As this is happening, the shot pushes in a tad. Notice a rough cut here as if the box wouldn't open as intended, so the editors spliced the scene together.
Continuity mistake: When The Mask escapes the club shootout, Dorian is left shooting at the air. He then gets tired and put his gun down. When the police arrive, he somehow has his gun raised again.
Audio problem: After The Mask gives his "Oscar winning speech" and Dorian sticks a gun in his face, "You're not going anywhere" can be heard. No one says this and was poorly recorded.
