` ` It was a freak , unusual accident , '' says president of Society of the Blind . Investigators want to probe what caused the National Theatre 's ceiling to come down . The society 's president , Mark Rubinstein , told CNN on Friday there had been no warning of any problem with the Apollo 's ceiling . ` The collapse injured scores of theatergoers , some of them seriously . ` ` It could have been a lot worse , '' he says of the ceiling .
` ` It was a freak , unusual accident , '' says president of Society of the Blind . Investigators want to probe what caused the National Theatre 's ceiling to come down . The collapse injured scores of theatergoers , some of them seriously . ` ` It could have been a lot worse , '' he says of the ceiling .