[Ed shrugs and stows the bag away - still largely uncomprehending, and he has half a mind to start lecturing the guy about equivalent exchange just to make sure they're on the same page, but hey, it's not his loss.

The next thing Billy says interrupts him as he's staring at the ceiling and impatiently drumming his fingers on the side of the stool. He blinks.] Hurts? [But his confusion soon clears, replaced by a slightly sheepish grin.] Oh, right. Nah, don't worry about that - there aren't any real nerves in there. And everything's already hooked up, anyway. Unless you suddenly want to try switching it off and back on again, I won't feel a thing. [Which he says perfectly casually, but then he pauses.] Just don't, okay?