This, it's an American movie made in 1989, I think. It's about two "rocker dudes" who are dumb as hell and are in danger of failing a history report and be sent to military school and never being able to start their band. Strangely enough, their band is what will one day end poverty and war, and allign us with other planets, so a man from the future (played by the late, great George Carlin) is sent back in time to help them.
It's hilarious and accurate at the same time. It stars Keanu Reeves from the Matrix movies. lol