I was sleeping in late today, when I was awaken by the loudest engine ever. It sounded more like a boat engine than an automobile. It was so loud that I could not tell which direction it was coming from, as if it were inside my eardrum, or simply coming from everywhere. I was afraid it was the trumpets of the Revelation for a moment.
It was not a piercing sound that hurt my ear. It was just so loud and constant that it became everything.
It woke me up, obviously, and the sun was coming through my blinds so bright, I thought for a moment it was the end of the world (and solar system). I have never heard the Earth being destroyed before, so I was fairly certain that was it.
The light was pure white, probably because the cones in my eyes were being exposed to too much light. No color could be visible for over a minute, which further supports the cone statement.
It was astonishing, and pure.
I think it actually was the end of the world, but in a fleeting moment I willed it not to happen, and it did not.