I made them useing 3d Studio max, It takes about 2 hours for each one, and hard tricks get confusing but, I made them and i didnt get them off a website.
it´s something weird-looking about it...He throw himself backwards and finish the spin, and then he just somehow leans forward in the air...that will not work...actually you can´t do a cork 3´, it will always turn out to be a flatspin 3...