Mandi Bierly
July 28, 2009 AT 05:12 PM EDT

Spinal Tap stopped by Late Night with Jimmy Fallon Monday to promote today’s Blu-ray release of This is Spinal Tap and their latest album, Back From the Dead. Enjoy the clip below in which the band performs the title track, announces their retirement, and reunites (which is a good thing, since they’re booked on The Daily Show with Jon Stewart this evening). Then, if you haven’t seen Ricky Gervais Meets… Christopher Guest, an interview conducted in 2006 for British TV, watch the second clip. Guest talks about two of the inspirations for the 1984 film: A conversation he happened to overhear between a British band manager and bassist in a Los Angeles hotel lobby while he was waiting for a friend and the ill-fated 1979 tour of Lenny and the Squigtones.

More Spinal Tap:
Interview: Nigel Tufnel brings Spinal Tap back from the dead
This is Spinal Tap on EW’s Cult 25: The essential left-field movie hits since ’83
This is Spinal Tap named Top Cult Film of All Time

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