back to the video..
that's how i learned how to do a 5..i kept going bigger on my 3's and after doing what you did a couple dozen times..you learn to correct the spin and land a 5.
then clean it up.
I doubt you got a concussion from that and the click was the ski's not his legs (i'm pretty sure)
and are you guys really internet fighting? that was cool when protigy was new and the internet only had chatrooms