Curtis watches the light spiderweb up the prosthesis. His hand rises to rub at the chain trailing under his shirt. "Does that mean it'll do the same thing it was doing the first time?" he asks. "Like, I think about moving my hand and -- "

The fingers of the prosthesis twitch.

" -- Jesus!" He jerks back without thinking. The prosthesis wobbles. Just before it topples off his lap, some signal from Curtis' brain hits the neurotransmitter: the fingers grab onto Curtis' leg, the disembodied arm steadying itself.

Curtis just stares.