Last night, I went to bed at around 9:20 PM because I was a little more tired than normal, but not by much.

I was in bed, completely still and relaxed for 8 minutes. Then, I suddenly felt what sounded like a cross between a light bulb burning out, and a whirring sound. I also saw a circular blob of white light in the corner of my eye on the left. It surprised me so much, I moved. I didn't feel paralyzed or anything, though - I just saw the light and heard the noise.

Is it possible this was SP? Or was it just in my head?