That’s because perfect comedy movies are extremely hard to conceptualize, require heavy self and culture awareness. 3 'This Is Spinal Tap' (1984)Christopher Guest, Michael McKean, and Harry Shearer as Nigel Tufnel, David St. Hubbins, and Derek Smalls in This Is Spinal Tap. Rob Reiner’s mockumentary felt so authentic that some early viewers reportedly assumed Spinal Tap was real. This Is Spinal Tap influenced mockumentaries across film and television, yet it still feels fresher than most of its descendants. Graham Chapman keeps Brian recognizably exhausted while the rest of the Python team populate Judea with lunatics.