Klunkerz is a fast-moving documentary that traces the global rise of mountain biking from it's Marin County roots, a gonzo sport long favored by fearless iconoclasts. An outgrowth of the Bay Area's late-'60s early-'70s hippy counterculture, mountain biking got its start right in MVFF's backyard. Pot-smoking adrenaline junkies from Mill Valley, Larkspur and surrounding towns took their pre-World War II bicycles known as klunkerz due to their fat tires to the top of Mt. Tamalpais. Then hurled t...