Before cranking the amps to 11 and shrinking Stonehenge, Rob Reiner had a vision for a mockumentary that would rock harder, play louder, and take out more drummers than anything Hollywood had ever seen. The filmmaker behind This Is Spinal Tap recently shared how the film and where the band were born.

Reiner, who played documentarian Marty Di Bergi in the film, appeared on the podcast Where Everybody Knows Your Name to promote the release of the long-awaited sequel, Spinal Tap II: The End Continues. The film reunites the original cast as they reprise their roles of the rockers 40 years after the original, coming together for one final concert.