David Lee Roth told a wild tale about the 1978 tour when Van Halen opened for Black Sabbath. Ozzy Osbourne vanished for almost 18 hours in Memphis. Black Sabbath guitarist Tony Iommi came after Roth, demanding answers about the missing singer. The 1978 tour brought Black Sabbath together with the brand-new Van Halen, who were pushing their self-titled debut. Black Sabbath backed Never Say Die!, the last record with Osbourne before he left the following year.