Rob Reiner on the set of This is Spinal Tap. Reiner would go on to direct a slew of classics.

A picture from This is Spinal Tap. The poster shows off this off-kilter band.

Spinal Tap re-wrote the book on loud. You haven't seen anything until you've seen this fictional metal badn!

This is Spinal Tap, the world's loudest band, as chronicled by hack documentarian Marti DeBergi on what proves to be its fateful early 1980s tour. A 1984 mock-documentary directed by Rob Reiner and written by Christopher Guest and Michael McKean, you have no choice but to turn this puppy up to 11.

Spinal Tap, the world's loudest band, is chronicled in a bogus documentary in "This is Spinal Tap" (1984), directed by Rob Reiner and written by stars Christopher Guest and Micheal McKean, who later made "Best in Show."

Nigel Tufnel (Michael McKean) rocks out in "This is Spinal Tap," a faux documentary about the world's loudest band.