I am helping at the RC Helicopter days (June 23-24 2012) in Dübendorf. The crew building the field on Friday was treated to two practice runs for a life-sized Super Puma military aircraft doing acrobatics (death spirals, knife edge drops, stall turns, etc). This is the first practice flight (of two).

http://www.custom-heli-events.ch/das_custom_event_2012.html