Metallica: Heavy metal band that released an album with an all-black cover "stolen" from Tap’s "Smell the Glove" (although the soundtrack of Marty DiBergi’s 1984 documentary also had an entirely black cover). Derek: "Metallica said thanks for the idea of the all-black album cover. Well, how about a bit of money off it?" (LAT) Tap, showing they don’t hold a grudge, made a cameo appearance on Metallica’s tour film, A Year and a Half in the Life of Metallica, Volume 2.