McBob, the Guns N’ Roses guitar tech who also introduces them, screwed up Tuesday night at their show in Melbourne, Australia when he said, “Hello, Sydney.” The flub drew a few boos and the band tweeted about it afterwards with Slash saying, “Apologies for the Spinal Tap intro!,” and Duff McKagan adding, “Don’t be to hard on McBob for saying ‘Sydney’ in the intro. His wife and family are from here.