Roger Corman and Peter Fonda, trying to do for LSD what they did for motorcycles in The Wild Angels (1967). It doesn’t take, perhaps because a subject so passive doesn’t lend itself to the action requirements of exploitation films. But there is a very funny scene in a laundromat with Fonda freaking out on a clothes dryer. With Bruce Dern, Susan Strasberg, Dennis Hopper, and a screenplay by aspiring writer Jack Nicholson.