I've pushed way too many cars that weren't mine. Probably like 10 in my lifetime? Few strangers, I like being helpful if I can.
Once was a teenager stuck on a very busy road during rush hour. They were in a small little two-door. So I pulled over to a side street ran out. Told her to throw it in neutral and keep her foot ready on the brake Incase I lose my grip and started pushing.
Everyone else was honking at her up until that point and continued even when I started helping. Eventually two other guys came by to help because I started going up a slope and had to really lean into. Still some old lady was honking at the three of us.
Just funny how people will honk nonstop like that's going to do something, assholes. If you're not physically able to help, don't, but lay off the damn horn.