From CHiPs Online:
The punks open Snow Pink's van by wrapping a chain around the door handle. That's a strange technique!
Before the van jumps onto the beach the volleyball players run. How could they be sure the van was going to jump onto the beach?
Ponch and Jon must be psychic. Without seeing the punks set the van in motion down the hill, they chase them.
When the guitar causes an accident, there's nobody in the crashing white car.
After checking one person at that accident, Ponch and Jon leave. They ignore everyone else.
(Ponch and Jon see shreds of clothing on the barbed wire that the bikers climbed over after escaping)
Ponch: These guys are crazy!
Susan Richardson (Snow Pink) is best known as playing Susan Bradford on Eight Is Enough. Doug McClure (Duke) is probably best known as playing Trampas on The Virginian. Along with Troy Donahue, he is the inspiration of the character "Troy McClure" from The Simpsons.