Tanner was the MGM lion whose roar opened the studio's Technicolor films from 1934 to 1956, including The Wizard of Oz. His fuller, deeper roar became the version most audiences associate with the classic Hollywood logo, and later clip compilations and soundboards preserved it as the definitive MGM roar. Online it is used like the dun-dun sting or the Imperial March: a cue that something epic is about to happen, from fake movie-logo opens to gloriously overblown entrances.