Continuity mistake: There's an electrical outlet on the wall below the window (aligned with the window shade's loop) in Sid's room near the Megadork poster, but when Sid throws Woody to the floor and raises the shade (before he scorches Woody's forehead with the magnifying glass), that outlet has vanished.
Continuity mistake: When Johnny Cage is fighting Scorpion, and he does his human spear, Johnny runs until he stops at the tree. The spear then catches up, and becomes wrapped around the tree in front of Johnny. When the camera changes view, the spear is just leaning on the tree. The camera changes view again and the spear is wrapped around the tree again. When Scorpion pulls the spear back, it goes straight back, and doesn't unwind around the tree.
Continuity mistake: As Brian lands the plane down to Bangor, his headset is on in a frontal shot, but in a reverse shot it isn't. (00:47:05)
Continuity mistake: When Alan is trapped on the floor, and the game is placed over his head, Sarah rolls the dice which fall on the lower left corner. When the angle changes they've moved further to the right.
Continuity mistake: At the beginning, Nix threatens young Dorthea with a real madrill, but that's all we see of it. It's never shown being put away, and it's not there when Swann and his crew break in to incapacitate Nix.
Continuity mistake: The pictures of Sara's parents in the locket switch places throughout the movie.
Continuity mistake: In the scene where Kat is being introduced to her new classmates, Casper is seen tying the students' shoelaces together. This includes the snobby blonde sitting in front. But when the camera pans out, her feet are clearly too far apart for this, not like how they showed them while being tied.
Continuity mistake: When Omri receives his new skateboard as a birthday present the deck is red with two white stripes. For the rest of the film it is red with blue stripes.
Continuity mistake: When they call the sausage company in Omaha, it is busy. When they show the phone in a couple shots later, it has more that one line and shouldn't have been busy.
Continuity mistake: Young Brian plays with his Star Trek figures on the carpet. When Fluke comes in, between shots the position of the other figures on the carpet has changed.
Continuity mistake: In the tournament at the end, the other people on horses that are competing don't even try to knock them off their horses.
Continuity mistake: During the Jacob's Ladder demonstration, the classroom clock remains at 8:10 throughout most of the scene. Then, in several brief flashes, it's 8:15, then 8:10 again, and finally 8:13. (00:32:00)
Continuity mistake: In the scene when Junior cuts the tree with his chainsaw, when he looks up to see how high it is, we can see it has branches. In the next scene when the tree falls on Scoutmaster Flimm, it doesn't have them at all and is cut straight at the top. (00:29:40 - 00:31:00)
Continuity mistake: In the church scene when Simon takes Hawthorne's soul, the flag draped over the casket changes from shot to shot. (00:15:08)
Continuity mistake: When Marie goes to sit down by the fireplace to care for the Nutcracker, who just had his teeth broken by Fritz, the chair has purple cushioning. Moments later when she is about to get back up, the chair changes styles, and the cushioning is blue.
Continuity mistake: Susan Lucci's hair color goes back and forth from reddish brown to black in several scenes.
Continuity mistake: During the scene where Hatch is being revived, a nurse starts to put drops in his eyes, within a few frames she is putting the drops in again.