I feel like sharing my top three:
This first one has two different variations.
First variation:
There is a man and his wife living in a huge, black/purple mansion. The are only ever in the main room, the one connected to the front door. The man is sitting on a huge pile of presents, and has a huge sword in his arm. The wife walks in, and she is very happy to see her husband. The husband says, "I got you a wonderful birthday gift this year.", and cuts off his arm.
Second variation:
Same thing but instead of birthday it's christmas.
The second one:
I am in my old house, and I woke up in my room, so I decided to go get my parents. After wandering throughout the house and not finding them, I stepped out side and looked at my neighbor's house. The upstairs light was on in their house and I started hearing screams. A few seconds after, I saw a wolf shadow. I got very scared and started to run towards my house, but I became locked in place, very aware of everything going on around me, so I knew the wolf was coming for me, and I couldn't do anything.
The third one, the scariest:
I am in a constantly shifting nightmare, some scenes from all of my previous ones, and some of them mixed up. But the thing is, it's all being controlled by this one person. Sometimes it would turn into a lucid dream for a second and the person would lose power, and I would drop a ball of yarn. I had to run from whatever the person sent after me and try to unravel the ball. Sometimes he would manage to take it, but I got it back. Each time this dream happened it wasn't exactly the same, the nightmares would always be out of order from the last one. But I would get the ball of yarn back soon and his power would weaken. And as soon as I unraveled the ball, then it was over, and I was awake. The last time this happened, I didn't get to unravel the ball, and I died, but I didn't wake up. Instead, I got up in the same place as I was when I died, and I was aware that I was dreaming, but not fully. It was like suffering from lack of oxygen. I managed to pick up a few cars and move them with telekinesis, as a result of my lucid dream, but I lost control several times and was plunged back into a nightmare. Ironically, I was never purposely trying to lucid dream whenever this nightmare happened.