In 1971, when Deep Purple were in Montreux to record the album "Machine Head", they were themselves scared by a fire in the casino when "some stupid with a flare gun burned the place to the ground" during a concert by Frank Zappa and the Mothers of Invention. Since their recording studio was also in the casino, they decided to make the album in their hotel. On the last day they needed to record one more song and decided to simply tell the story of their recording session, which became the lyrics to Smoke on the Water.