Strange thing happened to me this morning. My alarm went off at 7, and as per usual, I hit snooze until 7:20. But as soon as I hit snooze, it was 7:20.
No seriously, I hit snooze, rolled over, and my alarm was going off again.

I only remember this happening to me one other time when I was very young. I went to bed, rolled over, and it was morning. I didn't really feel tired, I just had no memory of falling asleep or even being asleep. It's a really unsettling feeling. Not "bad" or scary, just very very weird!