I don’t see it as “fun”, well certainly not type 1 fun, it’s probably type 2 fun – better in retrospect. It’s a challenge, not all challenges are “fun”, sometimes they are about seeing how deep you can dig, how far you can push yourself, etc.
Ian Barrington has done a couple – this is his first – interesting about the attitude, etc., required.
As for Corrie? I’d prefer to have all my fingernails and toenails pulled out!