"carpenters of the human body" I've seen a video of a knee replacement. And yes, it's very much like a carpenter working on a piece of wood. The hammering, the

"carpenters of the human body" I've seen a video of a knee replacement. And yes, it's very much like a carpenter working on a piece of wood. The hammering, the nailing, the sawing, it's all there. If someone was doing it to me, I would definitely be freaked out.