When Selena breaks the female FBI agents neck her head is laid to her right hand side. In the next shot her head is face up. Kind of hard with a broken neck.
When Matt and his father are playing with toys, Matt's front left tooth is just growing in. When when Matt is coming out of the shower a short while later, the tooth is fully grown.
When Gordon is handcuffed after damaging the ALC office, his hands are behind his back. When he is in the CIA office, his hands are in front of him.
When Gordy is shocked, the bat falls out of his hand, then disappears and re-appears between shots.
When Selena is looking at potential terrorist attack sites on a flat screen computer monitor, a Department of Justice sticker appears at the top right corner of the monitor, then disappears.
The coral snake that was shoved into the guerilla's (River Rat) mouth is not poisonous. It's stripe colours were red next to black stripes which is non poisonous. The poisonous ones have red next to yellow.
When Gordy returns to scene of the first explosion, Gates is introduced as a CIA agent, but wears an FBI badge. Typical CIA duplicity.
Selena and Claudio survive a gas explosion without a single hair being singed.
Considering this is a movie about a fireman the fires are unrealistic. No toxic gas clouds anywhere and everyone is safe standing tall while surrounded by flames. Gordon would also know to stay low when not in fireman gear. All he seems to know is how to make fires, like a pyromaniac.
Despite sliding down and swinging on well greased elevator cables, Gordy Brewer doesn't have a spot of grease on his hands or clothes.
When the homeless man drops the briefcase as the police bust through the stall door, the spring loaded hinge that pops the briefcase open is clearly visible.
After the gas explosion the terrorists are unhurt and not even a single hair is singed. The fire would have burned their lungs, killing them. Gordon was also lucky to escape the effects.
During the attack on the guerilla camp a special forces guy throws a hand grenade almost next to him and it even explodes in the near vicinity, but does not hurt him. In reality he would have died from either shrapnel or blast wave.
Claudio can easily travel to the USA without any disguise. He should be a top wanted suspect by now and would have trouble entering the country, especially since he needs to fly there to make it before Gordon and the others arrive.
One of the rockets fired from the helicopter appears to home on a target considering its trajectory.
During the funeral, the pipe music is out of sync with the pipers' movements.
As Gordy walks behind an ambulance at the end of the movie, the cameraman, wearing a dark shirt, is reflected in the rear window.
The Colombian soccer match is between America and Chivas, two popular Mexican teams.
The Colombians have Mexican accents.
The Colombian police and army have green uniforms, not blue nor beige.
Gordy enters Colombia through the Darién Gap, in the department Chocó, home of Colombia's largest Afro-Colombian population. However, no black people appear anywhere in the film.
During a gunfight about an hour into the film, Arnold stands behind a sycamore tree, which is not native to Colombia.
When the bomb explodes at the beginning of the film, Gordy is at the top of the stairs leading to the area where his wife and son are sitting. After the explosion, Gordy steps into traffic on the street, heading toward his wife and son, and is struck by a vehicle. He had no reason to step into the street; he was parked on the same side of the street as the bomb.
The terrorist group's banner, with the letters ALC and an outline of Colombia, is incorrect. The A is for Army, but the Spanish word for Army is Ejercito.