If you haven’t been watching The Tonight Show since Conan O’Brien took over the show last week, you might have missed a segment that aired Monday night featuring local WUSA-9 TV news reporter Armando Trull. The sketch, which Conan dubbed “Trull Busters,” features a clip of Trull reporting on a story outside a Metro station (looks like it could be Silver Spring, but it’s hard to make out), only to have a portly gentlemen…