Revealing mistake: When the red Autocar garbage truck hits the bible salesman's car, you can see a harness holding the two front tires in place for the truck to make the car fishtail.
Revealing mistake: When the lawn mower starts itself and tries to pursue Deke, from the back, the front wheels are on the ground and rolling. From the front angle, the front wheels are off the ground. There is a piece of material on the front that was added to hide the steering rig used to make it turn to chase Deke, but the rig's wheels are just visible.
Continuity mistake: The angle and height of the bridge changes depending on close ups and long shots.
Visible crew/equipment: During the ballpark scene, when the cans strike the coach they show a shot of the kids and there's a person in the background with a blue shirt standing there, then the cans attack the kids and he's walking around like nothing's happening. Obviously he's not supposed to be in the movie.
Continuity mistake: When Curtis is looking inside the gas station, if you look to the left where the pile of junk is, there's a white vehicle that's missing both headlights. After the tow truck tries to hit Curtis the white vehicle in the junk pile has a brand new left headlight.
Factual error: When the fuel truck arrives at the Dixie Boy to refuel the receptacle the spigot is moving by itself to release the fuel, however this is impossible because the spigot doesn't have electrical components, just like the spigot for the water sprinklers when Deke is riding through the neighborhood.
Audio problem: In the end when Brad is taking the dead woman's ring, the Happy Toyz truck is sitting there silently. If you look closely, you can see a gentle stream of exhaust from the pipes, meaning that the truck is idling. Yet a moment later you hear it starting up.
Factual error: When the fuel tanker comes over to have Billy drop fuel, he pulls the hose down and plugs it into the tank receptacle. The troubles here are that 1) the hose wouldn't be connected in transit, it would be stowed on the side unconnected. 2) elastic straps are usually employed to keep the hoses secured until the tanker gets to its destination to drop the load.
Other mistake: When the Happy Toyz truck is first being fueled, the nozzle handle is locked into the fuel position. When you hear the click of the nozzle stopping, the handle doesn't disengage as it should. When the attendant checks it, he unlocks the handle, and doesn't squeeze it again. Even accounting for the comet's effects, the handle must be squeezed to splash fuel in the man's face.
Factual error: When they run out of fuel at the pumps, a truck with placard 1203 rolls up for Emilio to refuel the underground diesel tanks. Diesel is 1202 - 1203 is gasoline.
Revealing mistake: When the trucks start circling the Dixie Boy the blue truck turns in front of the orange Bic truck if you look real close you can see a hand on the steering wheel turning the blue truck. (00:15:00)
Continuity mistake: When the Green Goblin truck is starting to back up to hit the bible salesman, if you look to the left of the screen you can see the red Autocar garbage truck parked, despite riding around the Dixie Boy as the bible salesman is cussing at it.