there is a video on youtube from inside the cabin of a JR/LR after a chute had been released inside the machine, and was almost going into the Main/Tail rotor.
after watching that i decided i would leave that stuff to guys with crews in the back and wings on their shoulders. having trained Airforce crew in the back and trained jumpers under a bit more control is the way to do that. Random guys that want the thrill of jumping from a helicopter doesn't do it for me, and obviously from the above, even with all the training they can still do something silly...