"He was still puzzled about that by the time he talked to me. I told him that if I weren't tied to a chair I would hold out a hand in his direction and see what he'd do with it. He wound up untying one to make the experiment, and he looked at me like I'd electrocute him and dithered about how to react, then shook my hand. And then I had one hand untied for most of the rest of it but didn't think of anything clever to do with that."