I don't have to think twice about this question,I saw Ozzy and Metallica in 86'.The worst show I ever saw.Ozzy was to drunk to sing and Metallica was too distorted.
It sucked from the opening song of Metallica to Ozzy trying to say goodnight.The second worst was Queensryche and some sh*t group called Piston.I had to suffer
through a 30-45 minutes of Piston and then Queensryche came out.Geoff ways wheling away like always,after they do the forth song they walk off stage.Chris Degarmo says Geoff's throat is to sore to sing.I was so pissed and they haven't come back since.I'm dying to see them and that was back for the Hear In The Now Frontier.