Other: In the penal scene with the pyramid, Yulaw knocks a person off the pyramid, and he rolls down the steps. A short way down, he stops rolling, and you can see him push himself off another step to get himself rolling again.

Continuity: In the scene where the police trucks are racing out of the garage and the first one hits its roof on the opening garage door, look at the truck the very next scene. There is no damage.

Continuity: Right before the evil Jet Li shoots the cop Jet Li, the cop Jet Li slides down a concrete wall with an huge groove in it. When he gets to the bottom of the wall, the groove is gone.

Other: In the scene where the bad Jet Li is fighting his way to to the top of the pyramid he throws one guy down the stairs. If you look you can see some people waiting to catch him.

Continuity: When Jet Li arrives home after checking himself out of hospital, on his way up the stairs there's no light visible through the curtains. Just after he reaches the top, we can see them again behind Carla Gugino, and there's daylight pouring through them.

Other: In the king of the hill scene, there is a point when the evil Jet Li pulls down two guys. You can see bits of the green screen in those few frames.

Continuity: When Jet Li has been sent to the penal planet and is on the floor, some guys walk up to him. Jet Li walks up the steps and the guys call him fresh fish, but they're still looking down to the floor.

Other: At the end of the movie on top of the pyramid, a guy comes from the right side. Jet hits him in the stomach, and then in the face. But you can see that Jet Li doesn't even come close to his face.

Continuity: When the evil Jet Li hits the motorcycle cop with his motorcycle, he crashes into a store gate and bends it. The camera angle changes to a wide shot and the top of the gate is now broken when it wasn't in the previous scene.

Continuity: When MVA Agent Harry Roedecker is hitting the evil Jet Li with the fire extinguisher you can tell that the entire scene was pasted together because Jet Li's hands are up in one scene then down in the next, then back up again as he's being hit.

Factual error: When Gabe is shooting at Yulaw through vents he first shoots at the opening above the door, then at the spot where Yulaw's hand shoots out. After this, he fires at the vent above the door again, only there are less bullet holes than there should be after the first shots at that area, let alone the two sets of shooting together. Also the hole where Yulaw's hand came down is no longer there.

Continuity: Right after the prison escape, Jet Li goes after another version of himself that is a cop. The evil Jet is hiding in the duct work, and even though the majority of cops are firing their weapons straight ahead, the bullets are hitting the duct work 10 feet above them.

Continuity: In the scene where Yulaw is in the vents and the police are shooting at him, you can see that the policemen's flashlights to their guns are on and pointed at the vents, but in the next shot where it shows the vents, there is no light shining on them.

Continuity: When the bad Jet Li is running from the cops, you can see 3 cop cars, but when he jumps from one bridge to another, you only see 2.

Plot hole: One thing, which bothered me after seeing the film, was the location of the wormholes, which would appear. Characters would pop out in a specific room consistently in one universe, the villain lands quite conveniently on top of a pyramid structure in the prison universe at the end, and that chair seems to quite reliably host all of the wormholes leading out of that particular universe; yet, it is explained that these links from universe to universe cannot be created, only forecasted. Now, from casual real-life observation, I’ve noted that a universe can be EXTREMELY large, so why do the wormholes always show up at the perfect place (or at least a favorable one), and not in the middle of a star or in an empty region of space? It seems the possibility of one showing up just within reach of someone on the ground in an accessible location is infinitesimally small.