Palm mute at the very beginning and slide down the neck from
12th fret to open E


e---------------------------------------|
B---------------------------------------|
G--------------------------------0h1-0h1|
D----------------------------0h2--------|
A------------------------0h2------------|
E—12,12,12,12,12,12,12/0----------------|

The "12," means you are picking the note very fast starting on the 12th fret
and slide quickly down. Listen to the song for timing.