When Screwface learns that Nesta and Jimmy Fingers are dead, he tilts the table where he was playing dominos, and one of the legs comes loose. He rips it out and uses it to hit one of his fellow Jamaicans. After his "I want Hatcher dead" speech, he throws the leg of the table to the ground (it can be heard), but in the next shot, the table has the leg again.
When the Jamaican, "Monkey," leaps out the hotel window, he lands on the roof of a blue, four door '60 Pontiac Bonneville, crushing the roof. Two scenes later (when Seagal and David are chasing the Jamaicans in a BMW through the streets in their Ramcharger), the very same Pontiac (with roof intact), skids through an intersection between the two vehicles in this chase.
During the attack on Screwface's Jamaican residence at the beach, Charles uses a HK MP5 with a silencer. This silencer was built by John Hatcher (Seagal) who demonstrated previously, that the firing noise was tremendously reduced. However when Charles fires the MP5, the weapon is apparently not silenced at all (it's as loud as without a silencer).
In the final scene, Hatch is seen carrying a body toward the camera with the feet on Hatch's left, head on his right. The scene cuts to show Hatch from behind and the body has instantly changed orientation with head and feet switched the other way.
During the car chase through the city park, both the Ramcharger and the BMW end up jumping off of a wall and through an intersection. In the overhead shot of the vehicles jumping, an empty parking lot with a Burger King can be seen in the background. When the camera cuts to a low angle shot of the vehicles passing overhead, the parking lot next to the Burger King suddenly has several hundred people standing in it to watch the filming of the scene.
As the black limo pulls into the garage, there is a front view of a man and a woman standing on the sidewalk waiting for the car to pull in. The next shot from behind shows only the man. The woman has disappeared.
In the department store fight, Hatcher drops the first Jamaican with a knife through the chest. Later, when Max enters the scene, the dead Jamaican can be seen lying in the background and his foot twitches once or twice.
When Hatcher is fighting the Jamaicans in the department store, he twists a guy's arm behind him and breaks his arm. In the next scene, you can see the man getting up from the ground, appearing to be struggling due to the pain. But the shape of his elbow is visible through the side of his jumpsuit, making it obvious that the dangling arm through his sleeve is fake.