I've still never gone up against a sword. And I really do not want to be stabbed again in the near future.
Hmm. Hmmmm. Good question. I feel as though most wagers are a little silly right from the jump. And there's no sense in betting money since money has no value here. I'm not sure we're at the point where we could make a saucy bet, either. Which really just leaves one option. A favor. Winner gets to ask one favor of the loser, payable at any time, and for any reason whatsoever.