Gary Clail (born 1959) is an English singer and record producer, and the founder of the Gary Clail Sound System. He was part of On-U Sound Records (and also the On-U Sound System) and led Gary Clail's Tackhead Sound System. They had a big hit in clubs with the 1991 song "Human Nature". == Biography == Clail worked originally as a roofer, but during the mid- to late 1980s, based in Bristol, he became a warm-up act for On-U gigs.... [more on Wikipedia]