I had that happen one time. I was cycling around our big lake where LOTS of runners/cyclists/walkers/rollerbladers go and I had a flat. I didn't have what I needed- my CO2 pump broke mid-pump, and it was obvious that I needed help (had my bike upside down, waved at a couple people to stop but none did) and only one person asked if I needed help. She was old and on an old, cool steel bike with no repair supplies.
At least she asked.

Humanity is good. You just chose a bad day where only the selfish were riding.