I was a fan of Cheech and Chong's records long before they did their first movie. The records were chock full of sketch comedy routines featuring a bunch of characters they created in their nightclub act.
A common thread in most of the records were two characters called "Pedro and the Man", who became the basis of most of their movies.
I bought this DVD just to get a chance to see of some of their old nightclub act. They do a few of their biggest characters, including Blind Melon Chitlins, an old blues singer and two dogs named Ralph and Herbie.