jack black and kyle gas play fantasy version of themselves in this comic showcase for their side band tenacious d and an art rock outfit with satirical and barbed lyric . an ex runaway obsess with heavy metal and a beachfront living and pot smoking slacker who pretend he a rock god meet and form a band ( the birthmark on both their butt cheek form the group moniker ) . open with a funny prologue which ape a twisted sister video from the 80 and the pick of destiny be a fairly well produce movie aim at old kid while it occasionally resemble nothing more than a middle aged variation of wayne world and with jokey stoner interlude and a climactic bout with beelzebub himself and yet black and gas have an enormously comfortable rapport ( they also act a producer and co write the script and all the music ) . the target audience will obviously go for it and though inspiration be a bit low and particularly in the second half ( just about the time our hero impulsively outrun the cop in a student driver car ) . the music sequence be far more successful than the attempt at movie satire and and for the first thirty minute or so and jack black manic enthusiasm be infectious . half from .