When my sister and I were a junior and senior in high school, we both worked on the summer maintenance crew at a local university. We had to be there at an ungodly hour in the morning. One morning, as we came around a long curve in the road just before town (we lived 25 minutes away), we were met with the sight of an overturned pickup truck and a dark-haired man with blood streaming down his face climbing out one of the windows. As we pulled over to the shoulder, he staggered a few steps, reached his hands out to us, and then collapsed face-first into the dirt.
This accident had just happened, the wheels on the truck were still spinning. As we sat there stunned, another car came from the opposite direction, pulled up next to the guy and went over to him. This was looooong before cell phones were common, and since we knew there wasn't much we could do for the guy ourselves, I grabbed a blanket out of the backseat, ran over to find out his condition and then yelled info to my sister as she ran to the only house nearby to call the police/ambulance.
She pounded on the door and finally this grumpy old man let her in, after grumbling that she had disturbed his show. This was before our area had 911 coverage, so she had to wait while he found a phone book since we didn't know the emergency numbers for this town. Police were notified and on their way.
Since we were first on the scene, we had to wait to talk to the police and ended up being very late for work. When we finally showed up, we were still so shaken up and running a bit on adrenalin, that our boss knew we weren't just making up an excuse.
We found out later the guy in the accident was a salesman for an auto parts store who had been driving all night and had fallen asleep at the wheel. When his truck swerved off the road, his front tire had gotten caught in a culvert and flipped the truck over. The culvert had been ripped halfway out of the ground and was still wrapped around his tire. I can only imagine how fast he must have been going around that curve. He was ultimately OK, thankfully. We started carrying a phone book in our car after that.