You’d think this late in the game, Santa Claus would be way too busy to just show up at the corner of Interstate 635 and Belt Line Road. But, then again, he tends to be there when you need him. And so, there he was, right after a two-car collision, directing traffic around the burning wreckage. "It must have just happened," said an incredulous Margie Culberson, who grabbed her iPhone and started taking pictures of the Good Samaritan Santa. "It was a fireball and a lot of black smoke."