Continuity mistake: When the good guys steer the small robot vehicle underneath the bad guys' car, there is a shot without the robot under the car, but in the next shot it is there again.
Continuity mistake: During the shootout in the street, Will Smith does a sharp turn while shooting at the Haitians and ends up killing one Haitian who falls back on a car. A few shots later at a different camera angle, you see the same Haitian man get killed and fall back on the hood of a car.
Continuity mistake: In the White Power vs. Blue Power scene, Mike jumps and shoots a bullet in slow motion. While following the bullet, you can see one man take 3 or 4 steps, before the bullet hits Marcus's ass and eventually the guy's neck.
Continuity mistake: When the Haitians are on the highway, one of the cars fall off and is dragged by a chain and it hits the large black Ford beside it, with just a bridge wall. Then when the thug (the one who says, "Jesus f***") is shown inside the car, there is a Maersk Sealand vehicle there.
Continuity mistake: When Syd gets out of the back truck after the high speed chase, she has blood on her nice white suit (probably since the guy next to her in the car was shot in the head). However, when she gets out to talk to Mike, her suit is clean and white again.
Revealing mistake: When Mike and Marcus are chasing the Haitians, when Mike does a 360 degree spin and then fires his UMP-45, for a split second when he is spinning if you look into the window, you can notice that the driver isn't really Mike.
Other mistake: When Mike goes to Marcus's house to apologize, as Marcus lets Mike in and they walk through the house you can see the corner of a very nice built-in pool through the glass doors, even though a large part of the beginning and the end of the movie take place in Marcus's '$3900' portable pool and its subsequent replacement.
Continuity mistake: After Syd is chased down in her black truck with the money in it, she meets up with Mike and Marcus. As she is talking to Mike, her bangs change positions. They go from down, to put up.
Factual error: When Syd throws the pistol to detonate the landmine, nobody in the nearby vicinity seems to be injured except one 'bad guy' despite the fact that many modern anti-personnel mines project shrapnel to a radius of 30 meters.
Revealing mistake: When Mike is fighting one guy in the Metro Rail and they go through the window, you can see a cable going down the pants near the ankle of one of the stunt man jumping out.
Continuity mistake: During the chase down the hill, through the shanty town, the bad guy's blue Land Rover's hood is shown smashed and bent upwards several times, but when they emerge at the bottom it is perfectly normal, and in the latched down position.
Continuity mistake: Near the end of the shootout scene in the pink house, Mike starts to bring his gun up to shoot the Haitian through the wall, and the gun is empty - the slide is back. When the camera changes the slide is forward - indicating the gun has bullets inside. He then shoots through the wall killing the Haitian.
Continuity mistake: When the Haitians have a shootout in the intersection, you see Mike do a 360 degree spin and then shoots the first Haitian in the green, but moments later you see Mike shoot him again. He was already dead.