As noted in the "have you been out today" thread, I was over at a feed station on the BHF L-B ride, fully intending to help my friends cook a zillion burgers. Shortly after I arrived aridr was spotted walking. My vociferous friend The Cheery Chippy hollered at him and suggested I could fix it. I had a few tools on board, a puncture repair kit and a brace of 700c tubes and that was all. Our friend was pushing something towards the BSO end of the things and had no tools, no pump, no tube. This meant I had to patch his, which took much longer than I'd like.
The next punter was a chap whose front tyre (700C x 25) had parted company from its bead. Hmm. I cast my eye along the line of bikes, selected one and removed the front wheel. "We'll take the tyre off here" I told him. A brief look of panic, then he twigged it was my bike. Tee hee.
I phoned home and had The Boy bring me a slack handful of 26 inch tubes and my folding tyre.
After that I had a more or less constant stream of customers, some grateful, some less so. Best was a bloke on a venerable Peugeot "racer", 27 inch steel rims, in need of a tube. I dug one out and let him get on with it. A minute or two later: "Is it clockwise or anti-clockwise to undo the nuts?" I gave him a clue and then watched in amazement and admiration as he removed two spoons from his tool kit, tyre removal for the use of.
Home now, thumbs hurting.