Like everyone else, I saw this late one Friday night on MST3K. Essentially it's a really lame 1950s infomercial to help high schools recruit more band zombies. It was produced by Conn, a manufacturer of band instruments, and is (entertainingly) bad beyond belief.
The essential plot: Buzz, a shy (and apparently, seriously disturbed) teen, is visited by an extra-perky and sexually confused woman in a Peter Pan suit, calling herself "Mr. B Natural." She than takes him on a magical misery tour of the hip world that is High School Band. He's under her evil spell! Slinging his trumpet like Miles Davis, our Buzz is now one of the popular kids and quite the chick magnet. Gosh, when *I* was in band all it did was get me out of P.E.!
The shrill, artificial dialogue (complete with horrible puns about being natural) and "Mr. B Natural's" gyrations defy description. One IMDb reviewer compared this film to the darkest thing David Lynch ever imagined, and I must agree. All you'd need is a dwarf talking backwards and Kyle McLachlan brandishing a trombone, and I think David has his next dream sequence. Do NOT see this film while on acid; it could do your psyche serious damage. And if Buzz were in school today, he'd quite likely wander into the band room when everyone else is out selling candy, and shoot holes in the tubas with his Uzi. One of Crow's lines in response to the awesomely bad script was "Have you no shame?" No, they didn't.