Neil Patrick Harris was a guest on Conan last night. While sitting in the hot seat he told a story about a charity auction that both he and Conan attended. One of the prizes was a walk-on role for How I Met Your Mother. NPH stated that they usually use these people as background scenery in the bar scenes. Well, as it turns out, Conan O’Brien was the winner of that particular auction. Will he go on the show and appear in the background (which is what he wants to do) or will he have a bigger part? I think it would be great to see Conan randomly in the background, perhaps just staring into the camera or at the group, something that is obvious and awkward. Watch the exchange below (the appearance talk begins around 5:25 or so).