Continuity mistake: At the beginning of the movie when Clark is driving home, he skids into his driveway where it is visible that the Ford Expedition is crooked and about three feet from the bike. In the next scene the Expedition is straight and right next to the bike, so that he steps on it when he gets out. (00:01:21)
Visible crew/equipment: Right at the start, when Clark is stepping up to the front door, you can see a microphone appear down from the top of the screen. Playing this scene in real time is the best way of seeing it, but watch closely because it's only in view for about a second. (00:01:38)
Continuity mistake: At the beginning of the movie after Clark trips on the bike, you can see Clark put the Vegas brochure in his jacket pocket. When he goes to open the front door you can see no brochure in his left hand. In the next scene when he enters the house the brochure is back in his left hand along with his briefcase. (00:01:39)
Visible crew/equipment: At the beginning of the movie when Clark is entering his house and the camera angle is from inside, just as he opens the door there is something red on his front porch. If you look at any of the previous scenes, that red thing isn't there. It's the bottom of a sunscreen being used to block the bright sunlight (which would have flooded the camera) behind Clark as he enters the house. (00:01:44)
Continuity mistake: At the beginning of the movie when Clark and his family sit down at the kitchen table to talk about their Vegas Vacation, watch the fruit basket in the middle of the table. It's there when they go to sit down and it's gone in the next scene. Every time it shows the kids it's there and every time it shows Clark and Ellen it's gone. (00:02:32)
Continuity mistake: When Clark hands Ellen the brochure about Vegas at the beginning, she holds it so the family is facing her, but in the next wider shot of her it's not. (00:03:05)
Continuity mistake: Clark gives the blackjack dealer $200 and asks for chips. Even though the dealer never give him any chips, in the next shot we see he has chips in front of him and he's already placed one in the bet area. In the next shot the dealer asks him to place his bet and we see that the amount of $5 and $25 chips in his stack far exceeds $200. (00:14:50)
Audio problem: When the whole family is at the Siegfried and Roy show Clark is asked to participate and they make him disappear and he doesn?t come back. At one point Rusty says "I wonder where Dad went" and Ellen responds with "I don't have a clue". If you read Ellen?s lips she is actually saying "I don?t know" and waves her hands. (00:20:21)
Factual error: On Marty the blackjack dealer's name tag, his hometown is spelled out 'Masellon, OH'. It should be 'Massillon'. (00:56:10)
Continuity mistake: Towards the end of the movie when Clark Crashes into Wayne Newton's house you can see the hood of the tour van is not damaged. A few scenes later when they pull up to the casino the hood has a lot more damage to it. (01:15:22)
Continuity mistake: At the beginning of the movie, when Clark is driving down the street looking at the map, there are 4 kids roller blading in the street. In one shot, one of the kids jumps onto a parkway lawn to avoid being hit by Clark's bad driving. Next shot, when they pan back to the kids, all 4 are still on the street.
Factual error: After checking-in at the Mirage, Clark is sitting by his hotel room window admiring the northward view of the strip. Based on the view he must actually be sitting at the nearby Treasure Island hotel.
Continuity mistake: In the first breakfast scene the ketchup bottle located between Clark and Rusty moves and at times vanishes between shots.
Continuity mistake: When Eddie and Clark are at the buffet, the cook has the two pots of chicken and beef, but the signs are in the wrong place. So he picks up the chicken and places it in the spot where it is supposed to go. He is about to put down the beef sign where it's supposed to go, and you see him pick up the chicken sign AGAIN and place it in the right spot, as well as the other sign.
Other mistake: Most evident in the massage scene, Jilly's gold ID bracelet on his left wrist is inscribed with the name "Jerry". Jilly is played by Jerry Weintraub.
Factual error: The club where Vicky works is advertised as being located on the strip but is actually on Paradise Rd. across from Hard Rock.
Continuity mistake: When Clark and Eddie go to the casino to get all Clark's money back, they walk up to the table and there is already a folded twenty dollar bill there. Then it shows Clark puting twenty down the same way.
Continuity mistake: When Rusty Griswold first gets his fake ID, he walks in to the Riviera Casino and goes up to the bar. When he tries to order a drink, the bartender asks for ID, right when he is doing this, he lays down a napkin, and then the scene switches and he lays the same napkin down in the same place again.
Continuity mistake: In the scene after Clark cashes a check to go to the card table Eddie orders a blue drink in a large glass. In the next shot when they walk away from the table Eddie's drink magically turns green. Then in the scene where they meet Wayne Newton, Eddie's drink is blue again.
Continuity mistake: When the guy takes the picture of Rusty, he's smiling a lot, but when you see it later in the movie, you see that he looks sort of confused in it, not smiling.
