I was walking out of a fast-food restaurant in Albuquerque once and there was a very elderly man standing next to his car with a very flat tire, looking forlorn.
I actually had somewhere I needed to be, but I offered to help him change his tire. He opened his trunk and I got busy.
I got out the tire, jacked up the car, then realized his spare was flat. Drove a couple miles to a gas station and filled it up; it would not hold air. Got it patched (my cost) then drove back.
While putting the spare tire on the car, I noticed the side of his car was damaged. In fact, the whole lower side of the passenger side of the car was extensively damaged; it was hard to see while the car was on the ground. And the flat tire wasn't just flat, it was shredded.
Turns out, the guy didn't know the car was damaged. Didn't know the tire was shredded. Only knew that the tire was flat.
I got the tire changed, got the damaged tire and rim back in the trunk, let his car down, and he drove off. Over a 12-inch high concrete barrier in the street as he turned the wrong way onto a one-way street, cutting off oncoming vehicles, which swerved and honked to avoid him. All four tires blew out and he ended up high-centered on the divider he drove over. He got out and stared at me from across the road as if I were responsible for his situation.
I called 911 on my cell phone and told them of a motorist assist needed, then I left. As I drove out of the fast-food joint, I noticed how he must have blown out the first tire; he took out a huge chunk of curbing and part of a US mailbox on his way in; the mailbox was tilted at a weird angle and the paint transfer on it matched his car. He damned near drove over the thing; no easy task. And he had no idea how he got a flat tire. Holy crap.
No good deed goes unpunished.