He stayed on because he wanted to find out what the trick was that made the gadget work.
With that gadget there, we can pick it up and throw it away.
Rummy as the gadget might appear, it had been the right thing to do.
I had made this gadget—it was a toy for children as far as I was concerned.
But I thought I'd have a chance to take any gadget he was hiding away from him ...