By Emilia Randall Olympic swimmer Richard Thornton died on Thursday after he “collapsed into the water” on a Californian beach whilst heading out surfing with his friend. Richard’s family confirmed the 65 year-old, who had been diagnosed with cancer, did not die in a surfing accident and added that the cause of his death is unknown. The Thornton family said that the son and father, who was receiving treatment for Multiple Myeloma died doing what he loved. “He could be in a hospital for six months with an oxygen tube, losing weight and all that,” his brother Marc told ABC 7. “What a way to go f…