I never ran across one in the action. I'm assuming the odds aren't hot. Probably tougher odds to be in the heat of one 4 days after being acquitted for murder.

I also never called 911 50+ times about scary black people. So some people just have extraordinary circumstances

kid until the police and ambulance came. It was a hit and run. The car veered and side swiped the boy on his bicycle. Fortunately he wasn't badly hurt.

a VW van (remember them - they were tippy!) rolled near our house. The folks in it got out ok & it was just a little from our house so my parents invited them in and called the police and local wrecker to help them. Pouring glasses of water/kool-aid counts as help, correct?

I was riding in the car with my Mom and she had just had some work done on the car. Apparently, they didn't secure the hood and she hit a bump and the entire thing flew off and landed in a man's yard. He kindly helped us put the thing back on!

The car he he hit ended up against a tree in my front yard and he was up a tree across the street. He was uninjured but shaken up. I let him in my house to chill out while waiting for the cops to arrive. He then asked me to go fetch a baggie of mushrooms he had stashed in his glove compartment (this was early 70's). So I crossed the street, parted the gathering crowd, crawled into the wreck, and rescued the 'shrooms. Hero!!

Woman driver had no seatbelt, no airbag, she hit the steering wheel.
Bunch of people stopped, some to move deer, some to direct traffic, I stayed with woman, who was conscious but in shock,
did the basic injury assessment routine, kept her still, in car, till ambulance arrived from 40 miles away.
I am very very good in a crisis, thankfully, and Red Cross training was required as part of my job, for many many years.
Also had to give first aid to a guy parked alongside a mountain road, his camper had overheated and the damn fool took the radiator cap off, got very bad steam burns to face and hands. We drove him and wife to nearest hospital.

This would have been in 1993 or 1994, in rural southwest Virginia.

A car in front of us started to smoke from under the hood. The driver started to pull over, and ran straight into a concrete pillar by the entrance to a shopping center, causing the whole front end to crumple up. I grabbed the fire extinguisher in my truck and sprayed the engine compartment while my wife helped the woman out of the vehicle, then ran into the shopping center to make sure someone had called for an ambulance and fire department.

About 5 minutes after getting her out, but before the fire department arrived, the car caught fire. The fire/rescue showed up soon after, and doused the fire. The driver was okay, but suffered some smoke inhalation from the crap spewing from her vents. State police showed up right as they were taking the driver to the hospital to be checked out, and took our statements.

A couple days later, a reporter from the local newspaper called and got our story. A piece showed up in the local paper about a week later with pictures of the burned-out car on a flat-bed wrecker. A reporter from the closest TV station (WCYB in Bristol, iirc) called, but as far as I know, no story was ever ran about it.

Nasty crash happened close enough in front of me that I almost wound up part of it, so I stopped, but no one really needed my help. So if asking people "are you OK" and sticking around to tell the PD what happened counts as assistance, then yes.