R.E.M. guitarist Peter Buck is out on bail after being arrested Saturday over an alleged air rage incident on a British Airways flight from Seattle to London. At a preliminary hearing today in London, Buck was charged with causing criminal damage to the plane, disobeying an aircraft commander, being drunk while on board and two counts of assaulting cabin crew. "I am very sorry for the incident and, of course, very embarrassed about the whole thing," the musician said in a statement. R.E.M. is scheduled to play at the South Africa Freedom Day Concert in London's Trafalgar Square on Sunday.