Have you ever had your wisdom teeth pulled out? I had mine out last year (the older you get -- the worse they hurt when they're pulled, BTW).

Likely, you got knocked out or sedated in some way. I got knocked out and when I got up, I was told that I kept walking around giving the nurses high fives and thumbs up! I don't remember any of it, and I'm sure the girl in this video doesn't remember this either. Prepare to laugh. Hard.