At the Smithsonian's National Air and Space Museum, holidays are a busy time of year. The D.C. museum fills to the brim daily with school kids on field trips, tourists, and families looking for an interesting way to spend time together. Current exhibits include Apollo to the Moon, Modern Military Aviation, and a detailed look at Space Race. Like all Smithsonian museums, entrance is always free. The National Air and Space Museum lobby was especially crowded the day that The United States Air Force Band decided to pull off a fun holiday surprise. Watch now to see this lucky crowd transform from confused to delighted within seconds in this epic video.