I've had a non-lucid dream before that it was the end of the world, and there was a huge nukular explosion, and I knew it was going to kill me, and as it hit me, I just started to fade....and it felt so real too....and just for one split second there was absolutly nothing there, nothing to see, nothing to feel, nothing to even think, my mind was completly and utterly empty of though....in sense....I was, everything was, and nothing was existant, just for one miniscule second....and then I woke up.