So, I'm in some sort of San Francisco-like place. I'm in a hurry to get to something... I'm not sure what. Suddenly, a sign saying "Speed -->" comes into view. Just what I needed! I go there and it's an experimental subway that can travel at the speed of light. Perfect. As I board, I notice I'm the only person getting on. One of the young women running the thing asks if I want regular super-fast or the speed of light. "As fast as it goes, please." She looks worried as she throws a switch. This frightens me.
Well, this train shoots off at the speed of light. When it stops, not even a second later, I audibly declare, "Whoa... that was awesome." But suddenly, I look, and the seats around mine are not empty. I'm sitting by some people I've never met, and my family is sitting in the row in front of me. The speed subway had somehow killed everyone in the world, and this was where I was to be for the rest of eternity. I'm not saying it was Hell, but not being able to sit next to my parents and sister for eternity was not a good deal. When I woke up, I had such a massive headache.
I think this is the first dream I've had in which I died. Most people report that they wake up as it happens... Good thing this was just a dream, though. Oh, and for what it's worth, my eyes stayed shut when my brain woke up. They felt so heavy I stayed there for a few minutes.