[MRM]

That's just a manual dexterity test for being able to manipuplate small objects with the first two fingers against the thumb. Evolution built that into young men. They'll all get it easily after a try or two. The secret is to relax as you do it. If you think about the reward that's waiting for you, you tend to pull too hard, stretching the elastic, creating too much tension. Isolate the hook with your thumb and fingers, pull just far enough to get slack in the system, and rub your first two fingers against your thumb. The tension snaps the hook right off.