Back in my paramedic days I had half a dozen personal life saves, and another half dozen team saves.
On a bike? A couple of incidents stand out. I was cruising home on the riverfront trail and I met a couple standing by the side of the road looking forlornly at one of their bikes. Turned out that they had a problem with the rear derailleur
Luckily it was a quick fix and they were on their way and I on mine.
Someone helping me? Mrs Dan and I were riding on a little used 'B' road on Skye and we pinch flatted. Easy fix...tube swapped and out came the pump. Which wouldn't pump the tire past 20 PSI.
Suddenly, three bikes came over the hill and pulled up. The delightful lads pulled out a pump and, voila, back to 80 PSI. We met them several times on Skye, and again in Fort William.
So if you ever lent a pump to a couple of Americans on Skye, drop me a PM.