full Marshall stack. According to biographer Tony Fletcher, Hendrix sounded "so much better than the Who it was embarrassing". The Who's appearance at Monterey gave them recognition in the US, and "Happy Jack" reached the top 30. The group followed Monterey with a US tour supporting Herman's Hermits. The Hermits were a straightforward pop band and enjoyed drugs and practical jokes. They bonded with Moon, who was excited to learn that cherry bombs were legal to purchase in Alabama. Moon acquired a reputation of destroying hotel rooms while on tour, with a particular interest in blowing up toilets. Entwistle said the first cherry bomb they tried "blew a hole in the suitcase and the chair". Moon recalled his first attempt to flush one down the toilet: "[A]ll that porcelain flying through the air was quite unforgettable. I never realised dynamite was so powerful." After a gig in Flint, Michigan on Moon's 21st birthday on 23 August 1967, the entourage caused $24,000 of damage at the hotel, and Moon knocked out one of his front teeth. Daltrey later said that the tour brought the band closer, and as the support act, they could turn up and perform a short show without any major responsibilities. After the Hermits tour, the Who recorded their next single, "I Can See for Miles", which Townshend had written in 1966 but had avoided recording until he was sure it could be produced well. Townshend called it "the ultimate Who record", and was disappointed it reached only No. 10 in the UK. It became their best selling single in the US, reaching No. 9. The group toured the US again with Eric Burdon and the Animals, including an appearance on The Smothers Brothers Comedy Hour, miming to "I Can See For Miles" and "My Generation". Moon bribed a stage hand to put explosives in his drum kit, who loaded it with ten times the expected quantity. The resulting detonation threw Moon off his drum riser and his arm was cut by a flying piece of a cymbal. Townshend's hair was singed and his left ear left ringing, and a camera and studio monitor were destroyed. The next album was The Who Sell Out a concept album paying tribute to pirate radio, which had been outlawed in August 1967 by the Marine, &c., Broadcasting (Offences) Act 1967. It included humorous jingles and mock commercials between songs, a mini