I had great pleasure in being allowed to Marshall the EH101 at Helitech 3 years ago, and much to the amusement of my colleagues and the aircrew, I learnt what an incredible Downwash that heli has. I was blown 20 feet across the Tarmac into a double skinned and propped security fence, four lengths of which went over with me.
I then had even greater pleasure the following year at Farnborough International 2000, when the same aircraft took out just as much fencing, two press photographers, a local constable and two cars parked in the wrong place, despite having given the display management a warning of the ferocity of the Downwash at a planning meeting.
What a monster !