Continuity mistake: Tracey's hair in the helicopter jumps from under the headset to falling around her face and back again.
Continuity mistake: When Tracy and Nick arrive at Tracy's ex-boyfriend's house in her helicopter, Shawn's (Tracy's ex-boyfriend) mini-pool falls apart and water spills everywhere. He and the girl are both submerged in water and go flying. About 10 seconds later, he runs to his car in a collared shirt and he is completely dry.
Continuity mistake: When Zack opens the cooler to see the heart, the level of ice cubes in the cooler lowers between shots. (00:58:00)
Continuity mistake: When Vicki and Mr. Grisham are stealing the money near the end, Grisham is in the driver's seat and Vicki is in the passenger's seat. After the cow lands in the car, one shot shows that Mr. Grisham is in the passenger's seat. (01:34:05)
Continuity mistake: As the monster truck revs up just before it drives over the ramp, the cars parked by the ramp change between shots. (01:23:20)
Continuity mistake: When Seth Green is being pulled up the side of a radio control tower while in a truck, the rotating radio receiver which is pulling the truck upwards groans and fractures under the stress, but the rope is not taut and obviously not holding any weight. (00:32:35)
Continuity mistake: When Zack and Enrico are driving along, and they swerve past the car, two cars behind them on the road disappear, and the markings on the road completely change between these shots. (00:56:30)
Continuity mistake: When Whoopi and her daughter arrive at the Silver City station, they are in a bus. The bus passes by the station, and you can see that they are fairly close to it. When they get off the bus and run towards the station, they are much farther away.
Continuity mistake: After Randy gets lipstick on his hand, he smears it on the steering wheel. But when the bikers are attacking them, smashing the car up, in many shots you can see the steering wheel has no lipstick on it. It returns later, when it gives Randy a moustache. (00:56:25 - 01:08:10)
Continuity mistake: Tracy throws a wrench and other things onto her (soon-to-be-ex-) boyfriend's truck. Several dents appear, including on the roof. She also drops a can of orange paint which spills up the windshield. However, for the remainder of the movie after this scene (as her boyfriend drives it away and later Tracy throws him out and takes it herself), there isn't a single dent left on the truck. Not just as she chases her boyfriend, but for the rest of the film.
Continuity mistake: When Blaine and Duane are driving alongside the pierced girl in the red car, the position of the blue bands around Blaine's wrist change position between shots. (01:22:00)
Continuity mistake: When Tracy is damaging Sean's truck, she throws a fire extinguisher, a wrench and then she throws a crowbar. As the crowbar hits the truck, you can see a spanner lying on the pavement - she never threw a spanner though. (00:44:50)
Continuity mistake: When most of the gang has arrived at Silver City, Owen jumps off of the horse he is riding, and then it cuts to a shot of Randy, who leans out of the lorry window to see what's going on. When it cuts back to Owen, Randy is suddenly sitting back normally in his seat. (01:26:45)
Continuity mistake: At the monster truck ralley, when Duane and Blaine burst in and then wildly drive along the track, they pass the same two monster trucks a couple of times. The monster trucks are a purple one, and an orange roofed one. (01:23:00)
Continuity mistake: When Blaine drives through a wooden fence into the monster truck race, we see the grille of the car intact, but it was seriously damamged, when it hit the rock by the oasis in an earlier scene. (01:02:55 - 01:22:55)
Continuity mistake: Another instance where Blaine's tongue ring is missing, is at the end at the "Feed the World" concert, where Duane, the singer of Smash Mouth and he sing "Hey now, you're a rock star..." over one mic. (01:40:35)
Continuity mistake: When Nick and Tracy kiss on the stage at the "Feed the Earth" concert, Tracy has her arm around Nick's chest in one shot, but it's around his neck in the next. (01:33:50)
Continuity mistake: When Tracy is in the helicopter, chasing Sean who's in the truck, look at the chopper's back wings/fins. The bottom one is very short, however during the chase after Tracy yells "I want my five bucks back," the back of the chopper lowers down, and the back bottom wing/fin hits the road - only in this shot it is much longer than it is in all the other shots. (00:45:20)
Continuity mistake: When Vera and Merrill first meet, they sit down and Merrill puts her handbag on the table so that the side with the little pink flower at the top faces Vera. In the next shot it faces Merrill. (00:08:45)
Continuity mistake: After dropping from the hot air balloon rope, Duane looks up and sees the car with Blaine on the hood, driving towards him. He gets up and starts to run away from the car, and behind the car in this shot is just field - previously there were cows in the field. The position of the cows change in a few following shots too. (01:01:45)
Answer: They only had blanks - the non-cut keys that are used to make keys. So when they saw those, they knew that the guy had their key.
wolfchild