Watch the Rake To The Shake online guitar lesson by Gary Hoey from Blues Rock Reactor
This riff is repetitive, using sixteenth note triplets in E minor pentatonic. It's great to use this one as a launching pad for some of your other phrases. I had heard this lick in some of my favorite songs over the years, from people like Slash and Joe Perry, and it's something that I'd always wanted to incorporate into my sound. I think you'll have a lot of fun playing it!