A postal truck caught fire last weekend in an east Orange County neighborhood in Florida and now the U.S. Postal Service is investigating the incident.No one was hurt and no packages were lost during the fire.The video above taken by neighbor Jeff Smith shows the blaze on Dec. 31.The postal worker pounded on Smith's door and begged him to call 911, Smith says. Smith said the postal worker pulled bins filled with letters and small packages out of the van so they would not catch on fire. Smith called her a hero for making sure the truck was out of the way of any neighbors’ property.Sister station WESH is awaiting a response from USPS on what may have caused the mail truck fire.