Abby Johnson, 10, left, and Aidan Johnson, 12, with their father, Nick Johnson, were among the hundreds of people who waited in a long line of vehicles on Main Avenue in east Bismarck to help celebrate the 65th anniversary of the Big Boy Drive-In on Monday evening. "It's an hour twenty we've been waiting," said Nick Johnson as their vehicle approached the landmark drive-in he has known "for 39 years, my entire life." To celebrate the anniversary, the restaurant was selling its "flying style" pizza burger for 65 cents. And what were the Johnson's ordering? "Pizza burgers," said Aidan. "And some fries," added Abby. Restaurant owner Chad Wachter said he grew up going to the Big Boy, like many people in Bismarck. "My parents actually met in the Big Boy parking lot," he said. Wachter said that at one point on Monday, cars were backed up on Main Avenue to Ninth Street. Police officers helped handle the traffic. More than 2,800 pizza burgers were served. "It came out to about four pizza burgers a minute, so it was a real stress test for the restaurant," Wachter said.