Gillan was required to learn Sabbath's old repertoire, but had difficulty remembering the words. His solution was to write the lyrics on a perspex folder and put it on the stage floor, turning the pages with his feet. Unfortunately dry ice on stage made it impossible to read the words, resulting in the audience catching glimpses of him peering over the microphone to sing a few lines and then disappearing below the dry ice to read the next set. Along with material from "Born Again" and older Sabbath numbers, the band regularly played Deep Purple's "Smoke on the Water" as an encore. Gillan decided that he could not have a long-term role as Black Sabbath's singer and quit the group after a second North American tour.