Revealing mistake: When the computer is being hacked and the password and/or code for the database is shown on the screen, most of the display is for an Autodesk printer driver. (01:39:00)
Continuity mistake: At the party scene in the early minutes of the movie, the bad guy who calls the two women to his place to "party" is shot once in the knee. Blood spurts and a gaping hole is made in his dark blue pant's leg by the bullet. Seconds earlier, the black hooker is shot three times. Where are the three gaping holes and blood on her solid white dress? Ah, there are none. (00:26:00)
Continuity mistake: When they're in the basketball court, Will Smith marches over to Martin Lawrence, saying "you left a strange hooker in my apartment?" He's holding the ice pack in his hand in the wide shot, but in close-up it's not visible. (00:46:55)
Continuity mistake: When Mike and Max are talking in the equipment room, the clock behind them reads 3:27:40 twice - once before and once after Marcus drops the weights on his chest. (00:16:55)
Continuity mistake: The kegs of ether in the truck have hazardous material labels applied to them. These are diamond shaped labels that indicate the class of material in the container. Throughout the chase scene they alternate between Flammable Liquid labels (solid red) and Flammable Solid labels (half red, half white).
Continuity mistake: During the shoot-out in the lobby of Mike's apartment building, Chet calls 911 to report the event. In the first shot of him he is holding two dogs and in the next shot he is only holding one dog. (01:34:33)
Visible crew/equipment: When Marcus is driving and Mike is saying that he is driving slow enough to drive Miss Daisy, when the camera is facing them from the driver's side you can see where the camera is attached to the driver's door. [This may only be in the full frame version. In the wide-screen version, the frame doesn't show any of the door, just the top of the wing mirror.]
Other mistake: In the Ether truck chase, Marcus is driving and turning the wheel excessively, however the truck remains on a straight path. (01:07:35)
Audio problem: When the bad guys attack the main girl's house, one is heard to be pumping his shotgun between shots. The gun is a SPAS-12, and the pump-action is only used when firing non-lethal rounds; otherwise it fires semi-automatically.
Continuity mistake: At the beginning of the film when Martin Lawrence is in bed with his wife, he wakes up on the left side of the bed and leans over turn the alarm off. The next shot he's on the right side of the bed and the alarm has moved to the right side too, he's reaching over to turn it off.
Continuity mistake: When Marcus and Mike are chasing the bad guys who have Julie, the sun changes between shots - while the bad guys are getting away in the cab, in the background you can see it's sunset, but in he next shot the sun is shining back again.
Revealing mistake: In the mad taxi sequence, there is a shot of the taxi with sparks shooting out. If you look closely you can see the device that made the sparks. (01:33:10)
Audio problem: When the Captain is on about the Heroin being stolen he says something along the lines of "we got nothing, and he left us a big f*** you". When he says "we got nothing" his mouth doesn't match the words on the audio. (00:14:25)
Other mistake: In the film, Lawrence and Smith's characters are Narcotics detectives with Miami Dade Police. There's no way they should be at any homicide investigations. Narc and homicide are totally two different units within law enforcement, so it's unlikely narcotics units would be at a homicide scene. Being the scene where they're investigating Smith's friend getting killed, and then they stumble across the dead body at the mansion.
Suggested correction: The captain called Mike and Marcus to the scene to help because it appeared related to the missing drugs. They were there to find leads to the missing heroin.
Yes, that could be correct, but the chances of that happening are slim to none. A captain from Narcotics wouldn't even have authorization to call his detectives to a murder scene to help out homicide detectives working a murder. Any information or clues would be collected and shared with other units or agencies if deemed appropriate.
Continuity mistake: After Mike has killed the bad guy at the end, the distance of the bad guy's hand from the gun changes instantly. (01:48:30)
Factual error: There is absolutely no way that Internal Affairs would have any authority or power to shut down an entire police force because of stolen drugs. As in the plot of the film, that type of decision would be decided by the city council on a vote and approved by the mayor. In any case, an extensive investigation would take place and the culprits would be arrested and prosecuted. No police force would be disbanded because of this absolutely fictional scenario.
Visible crew/equipment: When Julie rings Mike and ends up speaking to Marcus, Julie's microphone wire can be seen running along her jumper. (00:33:30)
Suggested correction: No it can't.
Other mistake: In the scene where Mike returns to his apartment for the first time since Julie was living there, as they walk towards the elevator Chet says "Hey Mr Lowrey" to Mike then says "Hey Mr Lowrey" to Marcus although Marcus never told him that he was taking Mike's identity.
Suggested correction: It's not in real time. They could have been back on a different occasion; we just aren't shown it.