Tamra Davis Director Dave Chappelle Thurgood Jenkins , Sir Smoke-a-Lot Actor, Writer Guillermo Díaz Scarface Actor Jim Breuer Brian Actor Harland Williams Kenny Davis Actor Rachel True Mary Jane Potman Actor Clarence Williams III Samson Simpson Actor Laura Silverman Jan Actor Tommy Chong Squirrel Master Actor Jon Stewart Enhancement Smoker Actor Snoop Dogg Scavenger Smoker Actor Stephen Baldwin McGayver Smoker Actor Willie Nelson Historian Smoker Actor Janeane Garofalo I'm Only Creative When I Smoke Smoker Actor Steven Wright The Guy on the Couch Actor R.D. Reid Scientist Actor Gregg Rogell Pothead Actor Kevin Brennan Pothead Actor Alice Poon Supply Clerk Actor Rick Demas Nasty Nate Actor David Bluestein Jerry Garcia Actor Neal Brennan Writer Julia Dray Associate Producer Ira Shuman Co-Producer Robert Simonds Producer Rita Smith Associate Producer Alf Clausen Original Music Steven Bernstein Cinematographer Don Zimmerman Film Editing Perry Andelin Blake Production Design Paul Denham Austerberry Art Director Vicki Graef Costume Design Andrew Shea Assistant Director Christopher Geggie Property Master Bob Hall Special Effects Joanna Colbert Casting Martin Malivoire Special Effects Dean Stewart Special Effects Richard LeGrand Jr. Supervising Sound Editor