[but that's not something I can do, Rincewind wants to wail.

That's the point though, isn't it? Showing there are some things you can't take back. Actions have consequences - how many times has the wizard snarled that same sentiment at others?]

I could promise to keep running. Just never come back. I'm not even on the same side of the country right now, you would never hear from me again. [in Arizona, actually, although he doesn't want to say that out loud.] Wouldn't that mean just as much as whatever contract you'd have me sign or swear to?