On 8 December 2003, Osbourne was rushed into emergency surgery at Slough's Wexham Park Hospital when he had an accident with his quad bike on his estate in Jordans, Buckinghamshire. Osbourne broke his collar bone, eight ribs, and a neck vertebra. An operation was performed to lift the collarbone, which was believed to be resting on a major artery and interrupting blood flow to the arm. Sharon later revealed that Osbourne had stopped breathing following the crash and was resuscitated by Osbourne's then personal bodyguard, Sam Ruston. While in hospital, Osbourne achieved his first ever UK number one single, a duet of the Black Sabbath ballad, "Changes" with daughter Kelly. In doing so, he broke the record of the longest period between an artist's first UK chart appearance (with Black Sabbath's "Paranoid", number four in August 1970) and their first number one hit: a gap of 33 years. Since the quad accident, apart from some short-term memory problems, he fully recovered and headlined the 2004 Ozzfest, in the reunited Black Sabbath.