Nasa KC-135A "Vomit Comet

NASA used this aircraft to fly parabolic arcs, allowing the occupants to enjoy about 30 seconds of weightlessness. Unfortunately each of these weightless episodes was followed by a thirty second, 2G pull out. Flying a series of these arcs led to the aircraft rightly deserving it's nickname of the Vomit Comet. Serial Number 63-7998, N931NA, National Aeronautics and Space Administration, 2004
(2008)