Continuity mistake: During the first fight scene between Phoenix and Spartan, Phoenix sticks his knife into several barrels of fuel and you see the fuel all over his knife but when he lays it on the table it's dry. (00:03:00)
Continuity mistake: When the Cryo-Prison worker opens the cabinet that holds the cylinders that contain the blue "freezing balls" to freeze Spartan's slush, the slot on the center left is empty. When the shot changes to the worker pulling the cylinder out, the slot to the lower left is now the empty one. (00:09:45)
Continuity mistake: When John Spartan is frozen in the cryochamber, at the beginning of the movie, if you watch during the credits - while the time is going by the small circular monitor that is on his chest and head, it changes from the left side to the right side of his chest and head in almost every shot. (00:10:10)
Continuity mistake: When Spartan is frozen, his mouth is open, but when you see him in the block of ice his mouth is closed. (00:10:15)
Continuity mistake: When Spartan is initially frozen in the cyro-liquid, air bubbles and ripples are in the ice around his mouth. Any following shot of him in the ice block shows no bubbles or ripples. (00:10:15)
Continuity mistake: When Phoenix first gets out he makes his way to a computer and the police come to arrest him. Phoenix takes one of the policeman and pushes his head through the side glass pane and walks away to fight the other officers, but when Phoenix goes back over to the computer the glass is not broken. (00:26:50 - 00:27:40)
Continuity mistake: When Phoenix is fighting the police at the kiosk, he knocks the sunglasses off of one officer, but in the next shot the glasses are back when the cop is knocked out. (00:27:00)
Continuity mistake: When Spartan switches seats with Huxley in the police car, the outside shot shows him get into the back seat. When the shot switches to Huxley in the driver's seat, we can see the back and Spartan isn't seen anywhere in the car. (00:42:40)
Continuity mistake: The guard Phoenix throws through the glass case has on footwear which resembles socks. As he is smashing through the glass, he has on heavier leather boots. (00:44:30)
Continuity mistake: During the glass floor shootout at the museum Spartan shoots a light that falls through the glass. Right after Spartan shoots the light it goes dark but the close up of the light falling and hitting the floor shows the light to be still lit. (00:49:05)
Continuity mistake: When Phoenix throws Spartan over the bonnet of the red car in the museum, Spartan lands in a puddle that soaks his hair. In the next few shots, the hair keeps changing from being soaked to being dry. (00:50:15)
Continuity mistake: When Spartan and Huxley go to Raymond Cockto's place, Spartan shoots all of the monitors with a silver gun, yet when Spartan points the gun at Cockto's head, which we see on the surviving monitor, it's a black gun. (01:18:25)
Continuity mistake: When Spartan and Phoenix are fighting in the sewers, Edgar Friendly shoots his gun at Phoenix and you see the catwalk that Phoenix was on tip to its side and Phoenix dropping down to the ground with the plank of the catwalk right below him. When Phoenix lands on the ground the plank is nowhere to be seen. It should have been right below him. (01:19:25 - 01:30:30)
Continuity mistake: When Simon Phoenix gets out of the sewer system (after gunning it out with the rebels and John Spartan) his left eye has the brown contact and his right eye has the blue one after going the entire movie with those contacts in the opposite eyes. (01:30:25)
Continuity mistake: During the Oldsmobile dealership scene two robed citizens are shown to be looking at small scale model cars on the rear wall (blue car) and side wall (red car) in the showroom. When Huxley and Spartan bust through the floor in the elevator the two citizens are missing. (01:30:50)
Continuity mistake: When Spartan drives the car through the glass window, you see glass everywhere. The camera angle changes to a wide shot and you see the car driving away but no glass on the ground. (01:31:05)
Continuity mistake: After Spartan goes through the glass SAPD sign, the car flips over on its roof. But when they show the car up close its now right side up. (01:34:35)
Continuity mistake: When Spartan and Huxley arrive at the cryogenics place to battle Phoenix and what remains of his gang, Phoenix sees them on the monitor walking into the building and you see Spartan on the left and Huxley on the right. The camera angle changes to an inside view and Spartan is now on the right. (01:38:35)
Continuity mistake: During the final fight scene, Spartan grabs Phoenix and they land on top of the ice block and roll off in front of a few metal jugs. The camera angle changes to a close up and the jugs are not there anymore as you see Spartan punching Phoenix. (01:46:35)
Continuity mistake: When Spartan slams the Cryogenic pill on the ground he is about 3 feet in front of Phoenix, but when you see him jump up to grab the claw, he is seen much farther away. (01:47:30)
Answer: I'm assuming you're referring to when Simon says "Damn, I'm possessed!" He was hacking the machine when he said it, perhaps he'd corrupted the program or shut off the microphone as a side effect?
Grumpy Scot