Strother Martin, Edie Adams, Tom Skerritt, David Nelson
I just watched this again and laughed a lot (and that's without being stoned). I am surprised by all the cameos (see subject line) of people you'd never expect to see in this kind of movie. That Cheech Marin must be some fast talker!
I laughed at the scene where the cop is about to bust them when another car runs into the back of the police car because something like that happened to me. I had an old car with the driver side door tied shut (because it wouldn't stay closed). A cop pulled me over (I think because of that) but before he asked for my license someone in another car drove by and threw a can at him. The cop yelled for me to stay put and jumped on his motorcycle to chase the other car. I just drove away. Wouldn't you?