After singer Jimmy Buffett fell off a stage during a concert in Sydney, one pundit joked that “maybe he blew out a flipflop,” referring to Buffett’s hit “Margaritaville.” But the accident is no laughing matter. http://latimesblogs.latimes.com/gossip/2011/01/jimmy-buffett-fall-out-of-hospital-doing-well.html Buffett, 64, appeared to just…