Living detached

A few days back I had this horrible dream.
Me and my parents were at a railway station going someplace.  At the entrance my father took a different route to go towards the platform for some reason.  Although dreams are supposed to be colourless, I distinctly remember him wearing a pink shirt. As me and my mother made way to the platform we saw couple of people walking on the track towards us. The person in front seemed very much like my father with his pink shirt and orangish hairs. Suddenly just behind them I could see a train moving in fast speed. It seems like He saw the train but moved his back towards it as it move forward.  I thought the train was about to stop, but it in fact accelerated. Before we could blink the train moved past the platform. The people on the track seemed to have been crashed by it. The bodies of victims was dragged into a tunnel into which the train went.  I ran towards it shouting I wasn't him. On the edge of the tunnel I saw a mangled body in pink shirt, but I still kept on saying it can't be him. Then his blood soaked face turned towards me, and I woke up from the shock.
It was 3:30 in the morning. All were sleeping around me. Nothing had happened but all seemed so real. I put some water on my face and came back to ask Google for meaning of what I had just seen.
Some said depression, but that was out of question as there was no pressure on me of any kind.
One of the reason was some graphical discription which has gone in to your subconscious mind. I thought about it and this seemed possible. A couple of days back a colleague had graphically explained how his mother-in-law while crossing a track in village had met a similar accident. Although I thought I had forgotten about the incident then and there may be it had stayed in my sub conscious mind somewhere and resurfaced in this way.
Had a hard time sleeping for next couple of days.
Got to learn how to keep myself detached from things out of my control.