I really don't get the point in the example of a magnet implanted in the hand. When I drop a screw its either easily picked up with my fingers, or in a place my hand doesn't fit at all. If you really expect to drop small, ferrous objects frequently why not just carry a small magnet, or better yet one of those extending wands with a magnet on the end?

The second use case of dragging paper clips is even more confusing. I get the novelty I guess, but that's really worth the risk of the magnet hurting you in some way?

They mentioned it being strong enough to pick up scissors or a knife, that seems like a pretty easy way to accidentally slice open the side of your hand. The risk of coming across another strong magnet that snaps onto the meet of your hand also seems like it could be really annoying and painful, like pinching the side of your hand in a drawer.