I just don't get it.

The introduction part that is played again in the song. I try it from tabs, but I can't play it as smooth, is it something there doing that I'm not, should I approach it differently or what?

THanks to all in advance

And sorry if this is the wrong board, seemed like the best one to post this one on
Testament are the Kings Of Thrash! Megadeth can go to hell!