By contrast, the worst dream I've ever had in my life went as follows:
I was in a multi-storey car park, but on foot. I was going up the levels via one of those spiral sections and, as the next level was just coming into view I could see an horrific accident about to happen. I stood there, helplessly watching as it unfolded. There was nothing I could do to stop it - I felt powerless. It was a very bloody and violent accident that ended in someone's death (no one I knew).
The dream was so distressing that it woke me up. I got up, went to the bathroom and went back to bed, relieved to realise it was just a dream. Unfortunately, I was not out of the woods yet...
I went back to sleep only to find myself back in the same multi-storey car park, ascending the same spiral staircase, but this time, with the full knowledge of what was about to happen. I shouted and screamed to let the people know they were about to have a terrible accident, but they were not listening to me. The more I shouted and waved at them, the more they ignored me. Again, I found myself powerless as the very same events unfolded in front of my eyes.
When I finally woke up the next day, exhausted from my traumatic night, I realised why it had happened. I had been prescribed valium for my migraines and I had allowed my supply to run out without ordering more. Apparently going cold turkey on valium causes your brain to do some very strange things!