Continuity mistake: When we see a close-up of Fred's car during the race, you can see there are two cars in front of him and there is nothing behind him, yet in the next shot he is being passed by a purple car.
Continuity mistake: When we first see Fred's car at the Indianrockolis 500, the car has nothing on the side of it, but when we see the car at the start of the race, a number "8" has suddenly appeared.
Continuity mistake: When Wilma is shocked to see Fred on the television, you can see behind her there is a window and curtains, but when we see Wilma in the next shot, the window has disappeared.
Continuity mistake: When we see Fred and Barney singing "Doo Dah" in the car while on their way to the track, Barney is sitting in a single seat, yet a close-up shot shows him sitting on a longer seat.
Continuity mistake: When we see Fred and Barney in the car on their way to the track, Fred's front seat is missing.
Continuity mistake: When we first see Dino at the condo, he has no collar on him. But when he chases the Von Slatens out, the collar appears.
Continuity mistake: When Barney is at the pay phone, there is a dial in the centre of it, but when he sees the car going off on its own with Fred in the driving seat, we cut back to Barney and the dial has disappeared.
Continuity mistake: When Fred picks up the receiver on the telephone, there are five holes on the dial, but when we a close-up of the dial in the next shot, there are now six holes on it.
Continuity mistake: When the hunter hits Fred on the head with a small rock, Fred falls down on the ground and there are some plants and rocks next to him, but when the hunter goes to see Fred, the plants and rocks are no longer in sight.
Continuity mistake: When Fred is sleeping, the time on the alarm clock reads 7 a.m., but when we see a close-up of the clock, it reads 5 a.m.
Continuity mistake: When Ann-Margrock is performing on television towards the end of the episode, there are a lot of people sitting on the couch at the Flintstones' house, but at the end there are only Wilma, Betty and Pebbles and all the rest have disappeared.
Continuity mistake: When Fred goes past Wilma into the living room to watch TV, he has a fish sandwich and is carrying a tray with a drink and a bowl of snacks on it. When he is watching TV, the bowl of snacks is nowhere to be seen.
Monster Fred - S5-E2
Continuity mistake: In the dinner scene towards the end of the episode, the dish in front of Fred has very little Chinese food in it, but when Pebbles wants some, we cut back to Fred and more has appeared.
Continuity mistake: When Betty and Bamm-Bamm are having their breakfast at the table, you can see there are two white dishes and a blue bowl in front of them, but when Wilma joins them, the white dishes have disappeared. The white dish in front of Bamm-Bamm, and indeed Bamm-Bamm, also disappear when the boy scout serves Wilma breakfast.
Continuity mistake: When Fred hits the rocks in the road while driving, Dino flies out of the trailer and lands onto the top of the car. At this point, you can see a set of golf clubs in the trailer, but in the next shot the clubs have disappeared.
Continuity mistake: When Fred and Barney are talking about their holiday while driving in Fred's car, the background changes from houses to the sky between shots.
Other mistake: In the "Old MacDonald" sequence, Fred tells the scouts that whoever he points to will sing the chorus in their own language, yet the German and Dutch scouts sing it in English.
Continuity mistake: The man at the Bedrock Auto Club initially has nothing in his left hand when he rolls out the map, but later on he is holding a stick that has appeared out of nowhere.
Continuity mistake: When the man lies out the map at the Bedrock Auto Club, Barney says to him, "We don't want to go camping in the winter!" and you see that Fred and Barney are next to the man. In the next shot, Fred and Barney have disappeared.
Continuity mistake: When Betty is combing Wilma's hair, the items on the dressing table next to Wilma change position between shots.
Answer: The ratings had declined in its last few seasons, and the series was cancelled.
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