Note he wasn't wearing hi-viz or hardhat by the looks, so what was he doing there going for the long line?
It looks like he was one of the crew. He seems to be wearing a harness. He does have Hi-Vis stripes on his (black) shirt but it isn't a full on vest. He also seems to be wearing a pilot's headset (ergo no hard-hat) so perhaps he was on ground comms and the pilot asked him to clear a hung-up long line. Unfortunately that doesn't seem to have gone to plan...
Who knows? I'm sure more details will come to light