I had a dream about being on a horrible fair ground ride that was basically a very small but very steep roller coaster. I was in the back of the roller coaster, and it crept forwards up the track until it was quite high and still on a vertical bit of track. Then it stopped, and I knew it was going to go backwards, but it was just stopped for a few seconds to build suspense.

Well I was shitting myself by this time and I suppose it got to be too much because I woke up sweating and looked at the clock and it was 1:30am!