Continuity mistake: At the end of the film, Johnny is shown driving onto the freeway northbound from Hollywood, then shows him in Calabasas, and then Thousand Oaks. That route takes him in a westbound direction, however, the section of freeway he's on in Calabasas is going eastbound (not westbound like he should be). Next, in Thousand Oaks, he's properly going westbound again.
Character mistake: When Johnny and Cleo leave the Chateau and head for Vegas, they are shown getting on the 101 freeway North (in Hollywood) and are coming from the east and turning right onto the freeway. The Chateau is in West Hollywood so to turn onto the freeway where they did, they would have come from the west.