gOlfer
You don't say in your thread if the engine had been shut down. If the aircraft is fitted with a rotor brake you should always shut down and bring the rotors to a stop before leaving the controls. I know of at least 2 instances when this wasn't done. The first involved the partial scalping of a passenger who was being guided out of the disc area by a pilot who had not shutdown his aircraft. The autopilot had not been disengaged and had unknown to the pilot motored the disc forwards.
The second occasion occurred at Battersea Heliport when a "celebrity" pilot left the controls with engine running to assist with passenger unloading. Needless to say he received the mother of all rollickings from ATC.
Both incidents were caused by a desire to save time. It ain't worth it.