On occasion when you board a helicopter you will see one of the occupants appearing outside the helicopter. When it is stationary on the ground, they will get whisked around in the rotars and when it starts flying they fall to the ground and once they hit the ground, reset and fly straight back up at the helicopter at high speeds. Sometimes this will cause damage, mostly they just repeat the process. I've never had it happen to my character before, and the persons it has happened to state they appeared in the helicopter on their own screen.