It's your Army background
I was alluding to the photo as being an example of putting lateral CG at risk. My company's experience was of a similar jump with two jumpers on each skid for a (supposed) synchronised drop, one off each side, step off, don't push, very thoroughly briefed.
So the two on the left pushed themselves off, the two on the right stayed on which added to the pilot's weight put the machine in a roll to starboard. The driver elected to go with the roll rather than risk stressing the mast, and went all the way round at the end of which there were no jumpers left on the right side either.
To this day we have no idea how they missed the blades, and a $5k mast inspection later we re-wrote the ops manual to allow jumpers only to depart from the opposite side to the pilot.