There is nothing like it. The tranquil sound of deafening silence after your earphones get ripped from your ears. The astonishing disbelief that you are not seriously injured (sometimes). Its a lot like a car crash in the way its seems to happen so quickly and violently.
Haha. Totally pulled a 6 off a double black roller on hard pack last weekend. Totally knocked the wind out of me and I was def out for a second or two. I thought I broke a rib, but I think its cool now.
There was some added scorpion action I'm pretty sure. Could have been that tree I woke up next hitting my helmet too.