sentences:  Van Halen, Scorpions, Dokken and Kingdom Come were promoting their then-current albums "OU812", "Savage Amusement", "Back for the Attack" and "Kingdom Come" respectively.Metallica did not release their next album "...And Justice for All" until four-and-a-half weeks after the closing of Monsters of Rock, although one of its tracks "Harvester of Sorrow" was showcased throughout the tour.At the opening night of the tour at Alpine Valley the sound quality during Dokken's set was poor and as a result the band was booed heavily by attendees.