Probably not in the "fantasy" category, but more in the "nightmare" category.
Every year for 7 years, on the same date of each year, I had this reoccurring dream.
In the dream, I was walking down the hallway of an office complex. All of the doors were shut, and there was a wall of water chasing me. I ran as fast as I could, trying to escape the wall of water. I tried each door, only to find them locked. Finally, I found one that wasn't locked, so I opened it and went in, closing the door behind me. The floor was blue and shiny inside of this office. As soon as I closed the door and took one step forward, I sank, as the "blue floor" was actually a small body of water. As I was struggling to stay afloat, the door crashed in, and the wall of water devoured me.
Each time I had this dream, I would immediately awake feeling an overwhelming sense of terror. I would go to scream or cry out, and no sound would come from my mouth. I was literally so scared that I could not make a sound. And, I was also incredibly wet when I awoke, I guess from perspiring, bedclothes, sheets, everything drenched.
It's been a few years since I've had that dream, but each time I think about it, that same overwhelming fear encompasses me.