They Made It Sticky: Monty Python
Released in 1979, Monty Python's Life of Brian spoofs everything from organised religion to left-wing political groups. So it's fitting that the radio ad for the film satirises the industry to which it belongs. The Python team take a familiar advertising message (buy this or something bad will happen), strips it down to its essentials, and gives it back to us with a dose of black humour.
Simple, funny and subversive. We love it. Have a listen.