hey all i started playing guitar in december (got one for christmas) and i was wondering if i could get some help on a few things cause i know at least a few people here play...

1. what the crap is a pinch harmonic??? and how do ya do it?

2.at the beginning of THIS SONG when he sweeps the pick across the top three strings does anyone know how he gets the sound as if he's picking each individually???

thats all for now but i'm sure ill be struggling again soon enough