Imagination of a Child

I've never felt that my family's house was haunted, but as a kid I was still afraid of the dark, and would usually go climb into bed with my parents if I had a bad dream or was afraid at night. One night I went and crawled in beside my mom on the edge of the bed facing the window. I can't really be sure if I fell asleep or not (I don't think I did), but I remember hearing a rustling sound over by the window, like the sound of a breeze blowing through a plastic bag. Right beneath the big bedroom window was a small padded bench on which my mom would put decorative pillows and other knicknacks.
As I looked at this bench, I thought I could see what looked like a transparent piece of crinkled Saran Wrap moving back and forth behind it. Suddenly the thing rose up from behind the bench to reveal a bizarre face that, once again, seemed to be made out of Saran Wrap: totally transparent and 'crinkled'. The face had a somewhat surprised expression, as if it were saying, "Oh! I didn't expect to see you here". It had a nose, a mouth, and two eyes, but the eyes were very strange, like cartoony swirls spinning weirdly in their sockets.
I only saw the face for a split second, but for some reason it sent a wave of chilling terror through me that I can still remember to this day, as I write these words. I shut my eyes tight and I think I must have been shaking, because my mom briefly woke up and asked if I was alright. I was so frightened that I couldn't speak, and she didn't say anything more.
I'm not sure what the face was, as I've never seen it again. One strange thing was that for years after, I would see things when I closed my eyes at night. When I first slammed my eyes shut after seeing the face, I could see things in the darkness, things that seemed to be copies of the face's slowly spinning curly-cue eyes. After that, I could see what seemed to be actual eyes, floating by in the darkness, looking blurry and misty, as if seen through some kind of smoke. I'm not sure what...