Other mistake: Vanessa is illiterate, but easily reads the Hi-Way Café menu. (00:48:35)
Continuity mistake: In the scene where Elle walks in to Joe's gallery, the camera takes a shot of her body from the bottom up. At this point she has on black high heel sandals. In the following scene, you see Elle in the background with brown, flat, daggy slippers.
Revealing mistake: When "Roy" is punched in the water by Mr. Brady at the end, when "Roy" hits his head comes up and it is obviously not Tim Matheson.
Continuity mistake: All throughout the movie the back projection does not match the locations they are at.
Continuity mistake: When the Presidents jump off the moving train, James Garner pushes Jack Lemmon off first, waits several seconds, then jumps himself. Given the speed and direction the train was going, Garner should have landed quite a ways away, to the left of Lemmon. But he ends up only a short distance away, to the right of Lemmon (based on the direction they were facing when they jumped.)
Revealing mistake: After the second movie sign, when everyone gets into the theater and sits down, there's a very obvious cut, as all the characters cut immediately from the position that they sat down in to a completely different position. (00:28:05)
Continuity mistake: In the early scene at the diner, after Paul sits down at the table, his insulated mug changes from in his hands to at his sides and turns itself after he leaves. (00:06:50)
Audio problem: When Sgt. Henshaw is telling the platoon to get rid of the horse, he is speaking but it's clear his mouth isn't moving.
Continuity mistake: In the scene where Jjaks and Freddie escape and are driving in the red car, she opens the bottle of champagne and takes a drink with her right hand then hands it to Jjaks with the same right hand, but when the camera cuts to Jjaks, she is handing it with her left hand.
Continuity mistake: In one scene, in the middle of the movie, one of the older players is sitting in a chair near the basketball court, and he is wearing sweat pants, white ones I believe. He is then asked to come in to play by Eddie (Whoopi Goldberg). He then stands up. But in the next scene he is walking up to the other players on the basketball court taking off a light jacket, but no sweat pants.
Continuity mistake: In the scene where Ben Stiller, Patricia Arquette and Tea Leoni go to visit Ben's adoptive parents, Mary Tyler Moore and George Segal. Mary and George get into an argument and Mary picks up the 3/4 Brie cheese wheel and chases George into the other room. Cut to Ben yelling at them. Then back to them, the brie wheel now much smaller. Then cut again and the brie wheel is back to 3/4 size when they return to the living room.
Continuity mistake: When the roaches are watching Joe and Lily make out on the couch, there are a few roaches swinging in the lamp. When the lamp tips over onto Lily, there are far more roaches that spill onto her than were on the lamp.
Continuity mistake: When Ricki Lake attends the 1st dinner with her mother in law, the servant puts an asparagus and some kind of a red thing on ricki's plate. In the next few shots, the red thing has disappeared. In the next scene, it is back on her plate.
Continuity mistake: At the very end there is a shot of (Dennis Miller) opening the door of a car for the lady, then cuts to the inside of the car, where her door is slammed shut, obviously by Dennis Miller, and approximately half a second after her door is shut, the passenger door opens and Dennis gets in the car. He must be able to leap over cars in a single bound.
Visible crew/equipment: When Angel Marie comes up to attack Fozzie, you can very easily see the forehead of the puppeteer, as well as the T formed by the human hand merging with the puppet hand.
Continuity mistake: When Mr. Clark drives his car to the inner city school, he asks a punk where the faculty parking is. The punk points to the parking lot and as John drives away all of his tires are blown out by road spikes (he goes through a wrong way road). When he gets out of the car, notice that some of his tires have mysteriously reinflated themselves.
Continuity mistake: During the scenes on the makeshift snowboard Jackie uses to evade the skiing soldiers, every time you see Jackie's face he is standing left foot forward on the board, but whenever you cannot see his face he is standing right foot forward. (00:19:45)
Continuity mistake: At the pool, Dosmo's grip on his gun repeatedly changes from one to two handed between shots.
Continuity mistake: The movie is set in summer in Southern California. Several times during the movie the characters complain about the heat. Yet towards the end of the movie when several of the castmembers are standing outside they all have sweaters and coats on.