Most amazing flying I've seen was Schui flying an Ultra Bandit at JetPower 2010. Couldn't believe the violent turns the model could take. I was zoomed out and I STILL couldn't keep up with the direction changes. I couldn't keep the camera steady toward the end of the flight because I was laughing so much.
Think I heard that it had a specially reinforced wing joiner so it could take the punishment.
This one flight was the one moment of inspiration I needed to start flying turbines next year. Can't wait.
(one example of hi G turn at 3:23)
http://www.youtube.com/watch?v=fAG83..._qcgDmeVg-dxiQ