 When The Who made their first appearance on the show, they were to  conclude their performance of "My Generation" by doing their usual  instrument smashing as well as having some smoke powder ignite in  Keith Moon (I) (qv)s bass drums as well. Earlier that day at  rehearsals, the band was dissatisfied with how the effect went off  so they asked that more of a charge be put in. Unknown to the band,  Moon put even more of a charge in later. As the band concluded their  performance, instead of a smoking effect, a huge explosion occurred.  This caused Moon to suffer cuts on his arm and, more importantly,  Pete Townshend (qv) suffered damage to his hearing, which would  affect him in later years.