Pollard, Andy Mahre, and i think Zach Davidson have done off-axis sw 3s in various movies. I dunno if i'd actually call them corked. It's definitely possible (but hard) to go off axis. i tried a few this year and landed them all on my back.
he just got sketched out on takeoff, and did one of those "i just did something crazy to save myself but i have no idea what happened or how" things, you know the feeling when your all fucked up in the air, and you somehow do something to not DIE