Working with Gibbs, Perry continued his recording career but, once again, financial problems caused conflict. Perry broke ranks with Gibbs and formed his own label, Upsetter Records, in 1968. His first major single "People Funny Boy", which was an insult directed at Gibbs, sold well with 60,000 copies sold in Jamaica alone. It is notable for its innovative use of a sample (a crying baby) as well as a fast, chugging beat that would soon become identifiable as "reggae". Similarly his acrimonious 1967 single as Lee "King" Perry, "Run for Cover", was likewise aimed at Sir Coxsone.