Funny name you have
Do you think that the beginning of the dream could have been from the perspective of "after" the death? In other words, it was turned around (the mirror effect), as if, after death, you were reviewing the death.
This would make sense from a near death experiencer's perspective, because they very often describe leaving the body just before the impact of whatever happens to them, or very quickly, in any case.
It is as if you obtained a safe perspective (the replica of the place of death) after the death occurred. This would make sense because spirits sometimes don't realize they have died and inhabit the same/similar place for a while. However, you seem to have been reviewing the death itself. As if a part of you was saying, "What happened to me?"
It would be interesting to carry on with the story, to see what happened after that review you appeared to have been experiencing. It would be an afterlife story.
Perhaps you would get stuck re-experiencing the death over and over and be a ghost in the barn appearing to others. Perhaps you would find yourself next to a guide who was kindly showing you what happened and ready to escort you to a different place. Or maybe you would follow the killer somewhere and show what happened on earth after the death or how events led to this place. Or maybe other spirits might be nearby, because it was kind of like a horror movie and you weren't the only one who died there at that time. There are a lot of ways the story could continue, of course.
In dreams where we seem to be on the verge of death, I think we do tend to wake up quickly, or don't remember much else if it did happen in the dream. Perhaps it disturbs us too much, and is an instinctual reaction. It could be that because you weren't afraid to experience this in your dream that you have very little fear of it.
I remember talking to a young writer who was somewhat disturbed while describing that her first character had died, the first death she had written about. It was part of the writing process that it kind of surprised her, just like it does for us in "real" life.