You pickers in Fretmentor's Blues Class, this G major pentatonic riff is actually pretty cool, and i've stumbled onto a few things. First,for us guitar players, i noticed the riff goes right into the A minor pentatonic box that starts at the 5th fret. Lots of cool stuff here for improvising. Dcone, is this also true on the mandolin? Also, for the guitars, i found out the 5 part of the riff can either be played starting with the open D string, or started off the 5th string by moving up a step, and continuing the pattern. I prefer to keep the riff closed, it makes it easier to visualize the pattern layout on the fretboard, plus it takes you further up the neck. I also incorporated an 8th note riff for a cool sounding turn around. We could easily spend a few lessons working this riff. Also, try modulating to a different key. Take it up a step to A.