When Bill, Ralph, and Pam rush out of the house to assist Bill's coworkers in the shootout, the vehicle that they are in as they pursue the criminals is a tan 1975 Plymouth Grand Fury. Shortly thereafter they are in Bill's usual Dodge Diplomat.
When Ralph (in Cobb's football uniform) is running off the football field and towards the locker rooms, he is wearing white shoes. But as he comes out of a passageway and ducks into a bathroom to lose the crowd following him, he is suddenly wearing the red boots of his superhero suit with the football uniform.
During the pursuit of the bad bus in the first scene, Ralph jumps out of Bill's car and runs in front of the bad guys' car. When Ralph sits on the ground to stop the the car, Bill's car is behind them but when Ralph stops the car , Bill's car is no longer behind them.
When Ralph sits on the ground to stop the bad guys' car the four headlights on the bad guys' car are all intact. However, when Ralph stops the car the left upper headlight is now missing.