If you've ever been on IMDb, you know that their movies are rated by readers on a scale of 1-10. Except for one movie. Rob Reiner's classic rock mockumentary This is Spinal Tap is the only movie on IMDb that is rated on a scale of 1-11, the fictional level Spinal Tap sets their amps to. Now crank it up to eleven in the latest installment of You Think You Know Movies!

Besides being completely hilarious for just fans of movies, This is Spinal Tap has a lot of fans in the rock and metal industry as well. Metallica's eponymous album was officially titled Metallica, but with an all-black cover, was designed and nicknamed The Black Album after Spinal Tap's fictional Smell the Glove album, which was also released with an all-black cover (“How much more black could this be? And the answer is ‘None. None more black.’”). Original Guns N’ Roses guitarist Slash is also a big fan of the film, but said the first time he watched This is Spinal Tap, it was right before a show and it hit so close to home it completely ruined his night.

“You Think You Know Movies?” is a ScreenCrush original series that dives deep into the cinematic worlds of your favorite movies and freeze frames a few tidbits you might not have known. We’ve already tackled Star Wars, The Avengers and Spider-Man, but now, put an armadillo in your trousers with these This is Spinal Tap facts!

Watch more installments of “You Think You Know Movies?” below and let us know in the comments what movies we should cover next.

Check Out 100 Movie Facts You May Not Know

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