There was a frantic scene in front of a Stamford diner Wednesday when a man robbed the owner and threw her to the ground. Maria Apostoros, the owner of Curly's Diner on West Park Place, says she was robbed in broad daylight by one of her regular customers. Apostoros said when 38-year-old Anthony Sena, of Stamford, asked her for money she gave him $40. He came back an hour later asking for more. When she refused, he pushed her into the street and took money from her apron. Police arrested Sena an hour later on Henry Street. He is being charged with first-degree robbery, second-degree assault, third-degree assault, and fourth-degree larceny. He is being held on $75,000 bond.