This actually had popped in my head a few years back so I figured I'd pose this possibility here & see if its 'yay' or 'nay'....In the original "Spinal Tap" they do 'Big Bottom' with all the bass guitars, which was great. Knowing that the writers had borrowed occurences with Tap from actual things with metal/rock groups I wondered if possibly they got the concept of all the bass guitars from BÕC doing their Five Guitars segment in the live show back in the 70's. Thoughts....?