Neil Patrick Harris strips down to his underwear...Reenacting a scene from the Best Picture winning Birdman, Oscars host Neil Patrick Harris locked himself out of his dressing room, and took the stage in just his underwear.PHOTOS: NPH underwear Oscar momentReenacting a scene from the Oscar-nominated 'Birdman,' Oscars host Neil Patrick Harris locked himself out of his dressing room, and taking the stage in just his underwear.