The documentary Anvil! The Story of Anvil doesn't just allude to This is Spinal Tap, it is This is Spinal Tap, except that it's "real," or sort of real, because obviously director Sacha Gervasi is as much paying homage to the greatest of mockumentaries as he is telling the story of an absurd (but well regarded in the industry) heavy metal band . . . and if you are a fan of Spinal Tap, then the film becomes weirder and weirder as the scenes grow more literally parallel-- and some are obviously constructed this way: such as the montage of ridiculous Anvil album covers and the knob in the studio that goes to 11, but when the two founding members of Anvil!, who were childhood friends, nostalgically hum the riffs to "Thumb Hang," one of the first songs they wrote together, and the scene happens in a deli, you can't help but think of Michael McKeon and Christopher Guest riffing on "All the Way Home" and it just keeps getting more and more like Spinal Tap-- there is a scene at Stonehenge and a disastrous tour and the drummer's name happens to be Robb Reiner, until, finally, in the last scene (which I won't spoil) you wonder if the whole thing is an elaborate joke-- but apparently it isn't, so sometimes life mimics art, and sometimes art mimics life, and sometimes I think I've seen Spinal Tap more times than is good for me.