As fate would have it

There are a events now and then in life that cause me to question reality, existence.. chance.. cause.. coincidence.. One such event took place today.
I was driving my son Ayden home from day care when I went around a sharp turn on the road, narrowly avoiding a giant rock that apparently became disconnected from its home at the top of the mountain. I saw the rock and had enough time to artfully dodge it.. 
The first thought I had as I drove on was that someone else would hit the rock—and quite possibly my wife driving home from work or someone else close to me. I decided to turn around.
After about another half mile, I found a safe place to turn.. Finally, arriving back at the rock, I pulled off the side of the road the best I could, knowing that I needed to be quick due to the speed of vehicles and the nature of the highway. As I got out of my car, the rock wasn’t just a rock; it was a boulder. Close up, I saw how enormous it actually was.
And just as quick as I stepped one foot out of my car, another car was heading dead straight for the boulder. It made contact.. both tires slammed over top of the of the piece of the mountain and the car did a 180 degrees spin before my eyes. 
I moved the rock, which had to weight at least 60 pounds, to the side and then drove behind the person who hit the stone. She was safe, and the child in the back of her car was safe, but rattled by the bounce.. Before leaving the scene, I made certain that she had a ride and that she was fine. The car was not, though.. both tires were shredded.
So it brings up some questions in my mind.
First off.. if I would have decided to turn around a minute sooner, I may have arrived before she had the chance to made contact with the hazard, thus saving her the miserable Friday night mishap.. But as fate would have it, that didn’t occur.
The other thought was how set on turning around I was. How immense of an issue it was for me to do it.. I felt that if I did not go back and take that rock off the road, someone would be hurt, or worse. So the fact I witnessed someone do what I feared was a bit of a shock.
And finally, I wondered this: Did my turning around to go back set into motion the series of events that ruined this woman’s car, but perhaps saved the life of someone else? 
I don’t know.
If the multiverse theory has any credence, an infinite amount of simultaneously happened. It just so came to be that I was in the universe where people were safe but tires were destroyed.
I just cannot shake the feeling that I need to go back.. almost that I knew something was going to happen. Or someone would be hurt. 
So the fact I witnessed before my eyes the very event I had a premonition of really has my scratching my head.
Coincidence, you may say. And you may be right.
Maybe.