Once, I had a dream where somebody took control of my hosting service right before my eyes. I was sitting in front of my computer in a complete dark room. Remote Desktop connected by itself, and Windows explorer opened by itself and started deleting folders and files. I yelled, "No!" and tried to turn off the computer, but it didn't turn off. Then everything got stranger...
Blockland opened up, and it joined a darkly-lighted server. There was some kind of build, but it all started getting deleted. Bricks started disappearing, and the GUI elements were fading away. Then Windows explorer opened again, and started to delete my Blockland folder. And then, some Blockhead popped out of the darkness of the room, and that was the end of the dream. I am not kidding about this.
Let me tell you one I had 7 years ago:
I don't remember how the nightmare started, but I was running across a sandy "battlefield". It was just flat terrain colored like light yellow sand. There were these red and green laser beams trying to shoot me, it somehow, I managed to dodge and outrun them. But then, I came to the edge of a cliff. The lases started getting stronger and closer, and that's where it all ended.