Witnesses said a woman set a man's car on fire in Jacksonville after he refused to buy her a McFlurry at McDonald's.WFTV obtained video of the incident that happened on Sunday. Witnesses said the woman was angry after she asked for a McFlurry and the man she was with refused to buy her one. They said the woman grabbed the man's keys and headed to his car. One witness said she saw her pour alcohol and gasoline on the man's car, light it on fire, and then run off. People nearby tried to help him put the flames out....