A burger-and-fries vending truck with a following in Tribeca burst into flames around 3:15 p.m. Mon., April 11, when one of its propane tanks exploded near N. Moore St. as the vehicle was going south on the West Side Highway. Mohammed Beydoun, 21, the truck’s owner, and an unidentified employee jumped out and were taken to the Weill burn center at New York Presbyterian Hospital with first- and second-degree burns. They were on their way to their customary evening vending location in Tribeca when the explosion occurred.