Me and a friend, who is the strongest kid in the school decided to have a friendly fight since we both knew mma and boxing. He was also one of these really strong wrestling dudes and almost one a wrestling championship or something. So he wanted to grapple for some reason and I don't know stuff about wrestling, so he got me and flipped me while throwing me (I honestly don't know how to explain this) and I landed straight on my head and I could feel my neck move a bit and I got unconscious for a few seconds. I almost snapped my neck, my friend apologized and stopped the friendly fight