It remains the funniest, truest, most emotionally honest movie ever made about rock & roll and the people who live for it. Can you trace the influence of this film through pop culture through the years? That would be like trying to dust vomit. The enduring power of Spinal Tap is how it gets the details so lovingly right, musically and emotionally — right from that opening scene where the roadies lift the giant skull, a reverent moment, as if the movie respects that this is a genuinely sacred ritual, ridiculous as it is. Most sacred things are ridiculous — that's the whole point of the movie.