OT: Spinal Tap Question

Hey guys,

I managed to stay awake long enought last night to catch Spinal Tap for the first time. Excellent film.

Anywho, bit of a question for you fellas, on one of the songs the lead guitarist played a well known classical piece on the guitar, I have no idea the name of the song or composer. I don't suppose anybody here has the title of the song, composer or possibly even a tab of it.

Thanks in advance for the replies.