 During the concerts, it was typical for both Brian May and Roger Taylor to have impromptu, instrumental interludes and for Mercury to engage in a crowd 'shout-along' whereas it was traditional for Taylor to sing one song.Brian May and John Deacon sang backup vocals.Other distinguishable trademarks were Mercury's microphone, which featured only the upper part of the stand with no base (which allegedly came about while Mercury was with "Wreckage" during which the bottom of his stand accidentally broke off), a grand piano, and May's hand-built electric guitar, the Red Special.