I hear ya fellas. One of the group fell hard and hit the back of his head. He came up from the fall and couldn't see for a split second so he prolly got knocked out from the back of the head hit he took.
So far my bad fall had my neck sore (which *****) but the amount of water that got shoved into my nose was the worst part. I still wanna go but I am cautious so as not to get hurt.