This is something of an amusing and interesting thread.
I once took my mother up for a flight in a warm climate with doors off. After giving her rather an extended pre flight briefing in the car on the way to the airport and again once seated inside the heli I figured I'd done my part.
Imagine my surprise when at 2000' feet and completely unannounced with camera in hand she threw her arm out the left side of the cockpit in an attempt to get a nice shot of the two of us whilst in flight.
Although I s*#t myself it was nothing compared to her. The airflow nearly ripped her clean out of the cockpit - the camera with lanyard round her wrist almost severed her hand off. Somehow she did manage to recover her arm and camera back into the cockpit but the battery compartment had loosed its contents like a couple of tiny drop bombs onto the unsuspecting world below and apparently not through the tail rotor!
Not much conversation for the remainder of that flight!
R1tamer