William Crum Staff Writer wcrum@oklahoman.comStreetcar observations "Oh, it's you." That was Kharlie Barnaby's reaction when he found out I was the guy who had been following a streetcar around downtown for more than an hour last Tuesday. Barnaby is general manager of Oklahoma City Streetcar operations for Herzog Transit Services. The streetcar goes into service Friday, with a grand opening set for 10 a.m.