This is good practice for double muted thump (W/Thumb) on (E) string. When playing this pattern, two (E)'s are displayed together in the chart (as 16th's), they are to be muted not played. The other stand alone (E's) can be played openly. The last two notes of the groove are actually chords (root F#,3rd B flat, lastly E) - (root E, 3rd A flat, lastly D) I play these chords in the higher register 21st fret & 19th fret. Have Fun !!