Although This Is Spinal Tap is a landmark moment in improvisational filmmaking, Rob Reiner and his cast didn't just wing everything. "We had to create an entire history of each of these people plus the band," the director tells YEAH! of the pre-filming process.

Below are the most key moments in this fictitious history... plus a couple more that actually became reality.

Before you enjoy Spinal Tap in a whole new way with the YEAH! Special Features Version of This Is Spinal Tap, this history lesson is yours to enjoy. And, yes, you will need to know all of this for the quiz.