As to being gristly, that's one of the dangers of sailing, and one of the dangers of ski tows and lifts as well. The medics call it "traumatic amputation" when a loop of line, or your scarf, gets wrapped around a wrist, a finger, a foot, a neck (yes, neck) and POP! the two sides get separated.
Which is one reason why sailors have traditionally carried sharp knives, because if you're lucky, you've got a couple of short seconds to cut the line, before the amputation happens.
I don't know, just seems so much simpler to try to do it the right way, to begin with...
You do realize that if anyone aboard that Amel had the presence of mind to cut that line, it would have dropped the guy aloft towards the deck, right?