Michael McKean, Christopher Guest and Harry Shearer give superb performances. It's a must-see.

Performances are pushed to the edge of caricature but remain horribly believable.

An instant cult classic, Rob Reiner’s 1984 mockumentary This Is Spinal Tap laid the groundwork for the modern improv comedy with its laser-precise skewering of the heyday of ’80s heavy metal and the vagaries of making it as a touring act.

Rob Reiner’s This Is Spinal Tap endures because he takes a group of insufferable people and makes us feel for them.