The sole purpose of these harnesses is to stop the wearer falling out, not to catch them when they do.
@ 5:00 is the bit we all remember most and the part that always springs to the front of my mind when I see these new bits of kit being handed around.
Watching the scene I think, 'Sarah (Michelle Joyner) isn't being stopped from falling when the kit fails, she is supposed to be being restrained'.
Having spent many an hour on the end of a UK military dispatchers harness, I'd have to agree with Oldsarbouy, "
I would recommend the Despatcher's Harness as used by the British military as being simple and foolproof and, with the ceasing of UK military SAR soon, there should be plenty available."
Lovely little note at 11:00
Whatever you use, I'm sure it meets all the safety requirements,
and some; just don't meddle