When Shaker sends a message to Kate, it says, "Mommy, 2:00 AM, Come Alone," but when Kate goes to the church, sunlight is coming in through the windows.
The tattoo on Maris' neck changes position frequently.
When Sean spits the cough syrup on Maris' shirt you can clearly see two large red spill spots on the left and right side. In the next scene she comes into the kitchen wiping her left side while the right side is completely clean.
While riding in the elevator, we see that Tom's apartment is on the 16th floor. From the balcony of his apartment, it can be seen that it is in no way sixteen stories high.
After the scuffle with Tom in the lighting store, Shaker's shirt alternates between being blood-soaked and clean.
Tom leaves the trunk of his Jaguar open when going to the news van to take their keys, and when walking back to the Jaguar the trunk is closed; however, when the shot begins after leaving the van, the jack handle is no longer in his hand, and he is next to the car door, so it can be assumed that he's put the jack handle back in the trunk & closed it before getting to the car door.
During the car trip to make the payment Jimmy speaks to Tom about "The time machine" and the two species: Morlocks and Eloi. At a time he states that Morlocks eat the Eloi, so they are cannibals. To be considered cannibalism a member of a species has to eat other member of the same species. So a Morlock eating Elois is not considered cannibalism. Could be considered a mistake of the character, who could not know this.
Jimmy actually refers to them as "people", so, for sure he didn't know.
Jimmy actually refers to them as "people", so, for sure he didn't know.
Clark starts the van and drives it at Shaker. Shaker shoots him but in the close-up showing the bullet hits, the van is stationary and in the same place it was parked. In the next shot, the van is moving again.
Visible seam lines on the top of Shaker's prop gun when he points it at Maris.
When the FBI agent shoots Cubby in the right side of the neck from the helicopter but on the infrared imaging he is seen being shot in the left side of the neck.
When Shaker shoots Miles, the contraption Miles is wearing (so that when Shaker shoots him blood can spurt from his chest) is clearly visible (as he lays dying against the van door).
When Shaker is shot in the left side of his upper back, the camera is on his front, and shows blood spurting out, signifying that the bullet traveled through his body emerging from his front. Yet the windows of the car van passenger door are not affected. Had the bullet traveled through Shaker and emerged from his front, it would have continued forward and hit the window of the van door (and shattered the glass).
After Tom has raised the reward to $4 million, there's an angry telephone conversation between Tom and Shaker. You can see Shaker's lips still move for a split second after the audio of him saying "Look at your wife" has stopped.
When Sean's flying balloon hits the side of the building, a cable can be seen lowering it as it crashes to the ground.
Shadow of camera on Tom's chest just after his son is kidnapped.
When Miles Roberts get shot it's obvious that he is wearing some kind of vest with blood-pouches under his shirt.
While Mel Gibson's character was driving to the quarry, notice that the same store fronts keep passing by. The most obvious one would be the yellow sign or a few lights that keeping repeating. This was because they were just driving up and down one section of Route 4 in NJ.
Just before the failed ransom drop, Shaker wipes a gun to give to Cubby, but uses his bare hand to put the clip in, thus leaving his finger prints.