Port St. Lucie police say an Uber Eats driver fired once after a man followed him from a restaurant, shoved him and produced a knife. iStock.com/[Pratchaya]A defensive gun use outside a Florida restaurant shows why the right to carry matters when an ordinary workday turns dangerous. An Uber Eats driver was picking up an order in Port St. Lucie when a man he had encountered over a parking spot followed him into the restaurant, then pursued him outside. Police say the man shoved the driver and pulled a knife as the driver backed away. The driver fired one shot.