Once, while touring. I have told this story here before.

I was flying down a hill on a loaded touring bike in rural Ontario. Saw a set of railway tracks. Silly me, I decided to bunny hop the tracks. Sailed cleanly over the tracks but landed and hard and heard a pop. Stripped out the tube, and patched it. It held....for a while.....long enough for me to make it down the road and across a ferry, where I came into a real isolated area. I got a little farther and then the slow leak was bad enough that I couldn't continue.

So walk of shame, had only brought a patch kit. Walked about 5 miles to a little hamlet that had a general store. Called my aunt who lived near my destination, she came to get me. Next day, new tires and spare tube, and never had another flat for many years.