A California father-of-seven says he was beaten-up by grocery store staff after making a sarcastic remark about the length of a checkout line. John Valencia was filmed scuffling with staff at Stater Brothers in San Bernardino on April 20, but said the violence escalated in a private store closet. He told Fox13 that the incident began when he went to pick up a coffee, only to be confronted with a long checkout line for a single cash register. Valencia says he asked a manager to open another, only to be ignored. When he told the manager 'great customer service,' in...