Did a Clonetrooper pick it up and put it in a trashcan on the way out? Did they just leave it where it was? If it was my arm, you know what I'd do? Save it in a big jar of formaldehyde and carry it around with me, so when someone asks, "Can you give me a hand?", or at "Let's give her a big hand!", I'd have a great response. I just love jokes like that.