One is sweet, two's even better, but three golds in three years at the Winter X Games? It's unheard of, literally. Until Shaun stomped his run last night in the Men's SuperPipe, nobody had ever won back-to-back-to-back golds. But uncorking the now infamous Double McTwist 12, Shaun wasn't all that fazed by history. "It's been a wild night for me," said Shaun at the bottom of the pipe. "Hitting my head didn't help anything, I've been seeing stars all night long," he added, referring to a helmet-popping, skull-rattling wipeout during a practice run not more than an hour before he took center…