"It can turn someone into a body part for someone else, replacing their old one. I kinda found it by mistake when I was messing around with the programming, but it was cool, so I left it in there. You can choose the target and the 'victim', so I could just as easily be turned into one of your body parts as you could turn into one of mine. Here, try it out," he says, opening the panel on his arm again and laying it on the bed near his side. "I won't look, so it'll be a surprise for me. I added instructions on how to use everything while you were in the lab, so you should be able to do everything without my help," he says, closing his eyes so that he can't see.