The cult classic Reefer Madness is part anti-drug propaganda and part salacious exploitation flick. Released in 1936, the movie used the educational angle to justify scenes of "drug-crazed abandon" (though these sequences seem quaint by today's standards). It owes its duality to the fact that it was funded by a church group before a producer bought and redistributed it (with more shocking material) as an exploitation film. The full feature-length movie is available at the Internet Archive, but here we've taken the funniest and most melodramatic scenes out of context for your viewing pleasure.
For more films from the Internet Archive, visit http://www.archive.org/.