I finished back-to-back randonnees (300 on Saturday + 200 on Sunday) and went straight to a get-together of some yachting friends. Trouble was, the saddle I used pre-Brooks made a fair old mess of my butt and my legs were stiff and sore. I moved in slow motion around the room to my food, and sitting down (and getting up) were episodes of self-loathing.
But, most of the people there knew I was into cycling and, after all, that's probably how they would have felt after 20 miles. A 200km ride was inconceivable.
Then there was a shoulder separation after falling on spilled diesel on a wet road... but seeing all my friends at the time were into cycling (or sailing), the injury didn't really register.