Watch the Over Dominant Chords online guitar lesson by Rob Garland from The Guitarist's Pentathlon

In this application I'm playing the Cm pentatonic scale against a C7 chord which brings out a bluesy quality because the major 3rd of the chord rubs up against the minor 3rd of the scale, creating some nice tension. I also talk about building a theme with your solo, which helps bring an audience along with you for the ride, even if there isn't one.