lol sorry dude but 'throwing yourself back' is a really bad explanation.
watch jon olsson do corks, he does them text book..
theres actually like 3 different i've done corks
1st way, the jon way, throw your spin back at your tails and look at them as your going off, this will automatically make you go corked, i dont know why, it just works.
2nd way, the way i do them now, carve hard pop off, drop shoulder and lift knees to chest, this makes you go wicked corked and i just find it the most comfortable.
3rd way, the way i first learned them, be too much of a pussy to go inverted on a misty