now-79-year-old frontman, Mick Jagger.Initially, the first time that Metallica opened for anyone since 1992 was deemed “an honor and a privilege,” the band’s drummer, Lars Ulrich, said on this week’s episode of the podcast “Club Random With Bill Maher.”“At that time, we had played shows over our career with Deep Purple and AC/DC, with a few other bands, all the bands that I had posters of on my wall when I was a kid. And so the last one of those boxes to check was the Stones,” Ulrich told Maher.“So we’re sitting backstage, and — and this is in no way a judgment on the Stones, this is really more about us — at one point a a personal assistant or whatever comes and says, ‘Mick Jagger’s gonna walk through here in a couple minutes, he’s going over to his private gym in his truck and he’s going to warm up before the show.