Speaking of not being able to use a computer mouse because you don't have working arms, how much would it suck to not have any arms? That's what happened to Karl Merk, a German farmer who had a really unfortunate run in with a combine harvester. But now, he's the world's first recipient of a double arm transplant.
He can do basic tasks with his arms now, like opening doors and turning lights on and off, but as they heal he should get better control over them. It's going to take time, and he's going to have to take medication for the rest of his life ensuring that his body doesn't reject them, but it's still and incredible feat of medicine.