When the kid is spray painting the name on the boulder, the name CHERYL alternates from being missing the L, to part of the L being complete, and then the entire name being present- even though he had dropped the spray can down the cliff prior to finishing it.
As Ponch & Jon are pursuing the sidecar they pass the same 3 construction vehicles on their right.
Caltrans's ill-fated attempt to carry the boulder away with a helicopter is doomed from the start. First, the wrong type of helicopter is used. Caltrans tries to use a Huey to lift the boulder, yet Hueys were not designed for heavy-lifting operations. There are double-rotor military helicopters designed to carry heavy loads, but even one of these helicopters wouldn't have been able to lift this boulder, which probably weigh hundreds of tons.
Dane would have needed more than one can of spray paint to paint Cheryl's name on the boulder.
After the sidecar breaks away, it has an extra rear wheel and a larger front wheel that were not present earlier.
After the helicopter arrives a supervisor walks to talk to Jon and the shadow of a boom mic is suddenly visible on the bed of a yellow dump truck.
It would've impossible for Ponch and Jon to keep a close distance with the sidecar like they were while on bikes>
When Ansgar and Kelly are fleeing Ponch and Jon, you can see the film crew and spotlights reflected in Ansgar's helmet.
During the dip a chip near the end, when its Turner's turn, the announcer calls him by his real name Michael Dorn.