Continuity mistake: In the gym, when Ian and Max walk up behind Gary and Wyatt, there is a closeup of their feet, and we see that the left laces on Gary's high tops are laced all the way up, tied snugly. However, when Ian and Max pull down the boys' shorts, in this close-up Gary's laces are only midway up the high top's eyelets, loose and untied. (00:01:25)
Continuity mistake: During the creation of Lisa, in some shots Gary is wearing a baseball cap and in others he is not. (00:07:30)
Continuity mistake: When the ritual candles are first seen, one of them sits in a white corner area of the Life boxtop. In a later shot the candle moves in and sits on (newly appearing) black text. (00:10:35 - 00:11:20)
Continuity mistake: There aren't any shoes on the Lisa doll, but the real life Lisa appears wearing high heels. (00:11:20 - 00:12:55)
Continuity mistake: After Lisa is created, a poster in the bedroom is ripped. Later, before the house is restored, the poster is whole again. (00:14:10 - 00:59:40)
Continuity mistake: As Gary & Wyatt get up to leave the Kandy Bar, some of the guys stand up also to joke around and make bets. In the following shot the men are still in their seats. (00:20:55)
Continuity mistake: In the scene where Gary has come home drunk, he reaches out to touch Chet's face. In the initial shot of him reaching out, he's using his right hand, then when they show a closeup of the gloved hand on the face, it's the left hand. (00:24:02)
Continuity mistake: When Chet gets home the morning after the big party, he does an about face at the bedroom door and starts to kick it open on one side. On the inside of the bedroom door, it shows Chet actually kicked the door in on the opposite side. (00:25:05)
Continuity mistake: When Chet and Wyatt are in the kitchen getting breakfast, the paper towels in the background are all rolled up. From the point when Chet says, "That's not a joke," a loose paper towel is hanging down from the roll. (00:29:50)
Continuity mistake: In the scene where Max dumps the slushee, the cup was filled way over the top with slushee. When he turns the cup to dump it, the slushee is now down way below the top of the cup. (00:32:30)
Other mistake: Garry and Wyatt are sitting on the side of a 'planter box prop' that was built for the movie, not a bench, when Ian and Max spill the Icee (slush) on them. (00:32:52)
Suggested correction: This isn't a mistake. Regardless of the fact it might have been built for the film, malls regularly have planter boxes that people can sit on (I've done it myself). Nothing in the film suggests they were sitting on a bench.
Other mistake: In the mall scene, when Gary and Wyatt sit down on the bench and Max and Ian dump the Icee on them, notice how much slush is actually dumped on them from a 32 oz. cup. (00:32:55)
Continuity mistake: Lisa has just exited the shopping mall. Gary pulls up in the Porsche. When Gary pulls up onto the curb, the cars behind the Porsche include A white coupe, a blue sedan, a silver Chevy Monza and a brown Lincoln Town Car. Gary gets out of the Porsche and says " Lis' we're running late" and the cars have completely changed except the silver Chevy Monza. Lisa turns to get into the Porsche and the cars behind them have completely changed yet again. Now they include a Brown Van and a silver 4 door Plymouth Horizon. Obviously the mall parking lot was not closed during filming, and this 2 minute scene was shot over the course of several hours. (00:35:40)
Continuity mistake: Lisa is trying to convince Gary's parents to let him go to the party. There is a glass of beer on the table. The camera switches to a close up and then back to a wide shot and the beer is gone. (00:37:49 - 00:39:10)
Continuity mistake: When Lisa's confronting Gary's father, her hands rest on her hips as clenched fists. As Gary sits down after being told to shut up, Lisa's hand is open palmed. (00:39:55)
Continuity mistake: When the four guys are waiting for the second doll-woman to appear, Gary's hand jumps from sitting on his leg to being up by his chin. (00:55:45)
Revealing mistake: There is a visible cord pulling the couch during the scene where furniture is sucked out the chimney. (00:55:50)
Continuity mistake: When Lisa shows Wyatt & Gary the grandparents in the pantry, her arms are folded - but as Gary & Wyatt are leaving, Lisa's hand is holding the pantry door open. (00:59:40)
Continuity mistake: At the party, Deb changes from having bright red lipstick to a subdued color. (01:06:50 - 01:12:30)
Revealing mistake: Arriving home from his hunting trip, Chet Donelly (Bill Paxton) finds Gary in bed with a girl. Chet whacks them both over the head with his rifle and you can clearly see the barrel bend with each hit. (01:13:54)
