What is the Pressure Roll?!?! Relax, I didn't know either until I read into it. I learned about the pressure roll from Ed Friedland, who is a professor at the Berklee College of Music.

The Pressure Roll is most simply a technique that saves on time and makes use of the kinetic energy that your fingers are already using when you play. The Pressure roll will also save you a lot of time and finger or pick strokes when you're playing.

To Perform a pressure roll, you start at any fret with the index finger (I'm partial to teaching this by starting at the A; 5th fret of the E string), and you pluck it or pick it, while the string is still resonating, you fret (not quite hammer) onto another fret like the 6 or the 7. This can be followed up by another pressure roll on an adjacent string.

In the example, I used a song that sounds an awful lot like Paranoid by Black Sabbath to display a use of the pressure roll.