Continuity mistake: When Dave and Josh are walking in the park and Dave ask Josh , "Did you see last night's sports competition?", the sun is shining making shadows on the ground behind them. In the next shot the sunshine and shadows are gone.
Continuity mistake: When the sergeant balls up the paper with the drawing of Dave and throws it at the cop, the cop keeps it and unballs it. The paper is clearly very wrinkled, but when he puts it in the fax, it is too straight for him to have straightened it out that fast.