From CHiPs Online:
In the scene after Grossie limps past Getraer in the hallway, you can see bright lights reflected in the bad guy's helmet. (...either that or the scene was filmed on Tatooine with its two suns.) During the first day of patrol in the valley, the sky goes from sunset to mid-afternoon several times. At the end, Ponch wonders who the "Mona Lisa" is waiting for. She's waiting with her elbow on Jon's truck. Doesn't that make it obvious? Also at the end, everyone gathers around to laugh at Jon's girlfriend. Where did Grossman come from? He wasn't there a moment ago.
Jon: Ok, from now on I'll be the bad guy and you guys try to catch me, all right?
Ponch: Cops and robbers?
Grossman: Patrolman and suspect, has more dignity.