Watch the 5-4-1 Shuffle #3 online guitar lesson by Andrew Ford from Bass Groove Survival Guide
This feel is similar to the last groove but using another popular blues pattern that focuses on the root, octave and b7th of each chord. For instance in the key of G, that would be G on the E string, G on the D string and F on the D string(ex). Also check out the chromatic triplet figures that tie the phrases together. They help set up the next chord.