Taylor Swift opened the 2013 Grammys with literal heat, in the form of some dude with a blow torch and a sort of flame-belching umbrella contraption. In a circus-cum-Alice in Wonderland motif, Swift stalked her way through ''We Are Never Ever Getting Back Together'' with reckless abandon and laid out the night’s first great reveal: An anonymous stand-in for an ex-boyfriend, strapped to a target. Though it seemed like she was going to toss knives in his general direction, Swift stuck with lyrical barbs and the drop-in line, ''I'm sorry, I'm busy...opening up the Grammys.'' Still, it would have been cool to see T-Swizzle (as LL Cool J called her) tossing some steel in some dude's general direction. B+