The only Butterfly I ever saw fly crashed on the second flight. It was dived by it's student pilot which folded the wings at about 200 feet after pulling back hard to loop I guess. The instructor had taken the plane up and basically turned the plane over to the student who decided he wanted show everyone what he had learned on Realflight.......not much I guess. I had previously refused to instruct him because of his attitude.
He never came back, just as well I suspect.