Help or explanations, please.

I was sitting in my car at a garage, waiting for my friend to collect her car after some repairs.
There were quite a few damaged cars, but the one directly in front of me had a lot of damage.

As I just sat there, with my mind miles away, (probably thinking about what to make for dinner), I saw a person in the damaged car. It was a female with long fair hair, and as I watched, she was flung forward with tremendous force, and a man then appeared in the driver's seat, directly in front of her. I could see him quite plainly and could describe his features and hair. He appeared to move forward only slightly, but I could see the horrified expression on his face.

It was the strangest thing, but I just calmly sat and watched this drama unfold, and as it was happening, the shattered glass of the windscreen was whole, but I hadn't noticed this occur.

It was only after I got home, that it hit me, that something very strange had occured. I assumed I had been watching some kind of replay of events that had taken place during the accident the car must have been in, and the driver had been supported by an airbag.

Until about 18 mths ago, I was quite normal, (well in my opinion, anyway, lol). In this period, there have been quite a few weird things happening, especially in my home.

Has anyone had a similar experience, or can anyone help with an explanation as to why these occurences are happening to me. I have lived quite a long life without any peculiar events, apart from a few when I was a child.