Not me, sadly, but our bassist at the time. 1972, he worked in a music shop in Newcastle and he had an electric upright bass for dale in the classifieds. He gets a phone call about the bass. "I am interested in the bass, can I come and have a look?" Aye, no problem I'll be home at 5.00. Gives the guy his address. Whats your name by the way? "John Paul Jones" says the caller. Yea, right, thinks our chum, one of the other music shops doing a wind up as Zep are on at the City Hall that night. "Ok, see you at 5.00 says our hero." 5 o clock comes, knock on the door, and there stands JPJ with a taxi ticking over outside. My mate picks his jaw up off the floor. JPJ buys the bass and says "Are you coming to our gig tonight?" No says our guy, its sold out. JPJ gives him some sort off pass or ticket and tells him to come to the stage door. They pitch up and are told to sit on the steps at the back of the stage, they get some odd looks as they are the only people on stage, until Zep start playing. To say he enjoyed it would be an understatement. He still dines out on that experience.