As Chooch goes cruising, there are several breaks in continuity between the point-of-view shots and the shots showing his surroundings.
The considerable distance and the intervening high point in the road would have prevented the other characters from being able to immediately tell whether Bobby or Moon had won the drag race.
Footage from the opening montage repeats before the end credits. Director William Sachs claims that the tight budget and shooting schedule precluded filming enough usable establishing footage to avoid repetition.
The climactic drag race takes place in the morning, but the inconsistent shadows cast by the actors reveal that the sequence was shot throughout the day.
After the car at the gas station is smashed, several people can be heard applauding, but only one character claps on-camera. The additional applause presumably came from the film crew or was added in post-production.