Dream about witnessing a horrible car crash...?

Hi all, I had a pretty horrid dream last night. I was driving alone myself down a normal route I take and waiting at a traffic light junction. This was at night. All of a sudden I see a dark Bugatti Veyron speeding down the opposite direction. The speed of it triggered speed cameras and it kept going on in a straight line coming towards my direction where it hit / crashed into the car behind me on my left. The car immediately behind me caught on fire. I was going to run out to drag the person/ people in the car and called the emergency services. But as I looked behind, I saw the fire catching widly and it started to burn the wipers on my car so I drove to move my car away and as I did, it exploded.

I felt a bit shocked bout it. I also recall having to hide a silenced gun in the dream following the car crash.

CAN anyone help me?