When he talks to the woman sifting through the burned out house, Paul Rudd manages to say "Was the pilot's licence a piece of paper?" without moving his mouth at all.
Early on in the movie, Lance tells Alvin that he has his tool belt on backward when in actuality, the tape measure does belong on front. This type of belt is most commonly worn by carpenters.
The inspection sticker on the truck used in the film has a large 11. This is the Month. The year is printed on the sticker but each year has a different color for easy viewing by police.
The amount of painting that was done would have required a considerable amount of paint. There is only one gallon shown, where Lance paints his shoes.
Lance lights a cigarette with a BIC lighter which has a child safety lock, a feature they did not have in 1988.
Emile Hirsch's character "Lance" wears Ray-Ban Aviator glasses with the "Ray-Ban" logo printed on one lens. Ray-Ban did not add the lens logo until the late 1990's.