On the eve of the North American leg of the tour (a long stretch that would run from May to November), Malcolm Young decided not to participate in order to deal with a by-now problematic alcohol addiction. Unlike Angus, who had always been a teetotaller, Malcolm enjoyed drinking but in recent years it had escalated to the point where it began to affect performances. The band's former US agent Doug Thaler recalls seeing the band at one of the Monsters of Rock shows in 1984: "I'd gone into AC/DC's dressing room and had a scotch with Malcolm and Jonno Johnson while Mötley Crüe played. When AC/DC went out to take the stage, Malcolm had clearly had too much to drink. And they were playing the song that Angus used to do his guitar solo and strip to, and Malcolm would just barely keep a steady rhythm—he couldn't even do that. And he fell into the drum kit, and I thought, 'Oh boy, this is not headed any place good.'"