I try to help people out all the time. I'll give stranded people rides, and push people out of snow drifts or the ditch in the winter. Holding the door goes without question, especially here at work where we have keycards to unlock the door.
When I was in college, I was working for the city's street crew during one summer. I'd put notices on cars parked on streets that the crew was going to overlay the next day, so the owners would know to not park there. (If the cars weren't moved, we had the fun of calling a tow truck and watching it get towed around the corner). We overlaid a street next to a church in the south end of town on a hot day. After the crew made their pass, people showed up to the church for a funeral, and parked in the street. Of course, the rocks were still everywhere.
An older lady parked her 80s Camry right where a bunch of tar pooled up. She came out after the service, and saw that her rear passenger tire deflated. I don't know if she ran over something or if it was the heat from the tar, but she was ticked. She demanded that the Street Crew's manager do something about it, which he showed no interest. I volunteered to change it, and ran to this car dealership next door to borrow a tire iron. Her spare tire was sitting in a pool of water in the bottom of her trunk. Rust everywhere. Spare was flat, so I had to go back to the dealership to fill it up. Getting the jack to work was fun, too, since her car was in a lot of tar that pooled up along the entire gutter.
I got the tire changed, and there was not much thanks from her. I think I heard that she sued the city for a new tire. Haha. I should have just let that one go...