Watch the Riff Intrusion online guitar lesson by TrueFire from Play Rock Guitar 8: Advanced Rhythm Approaches
Riff Intrusion - Concepts & Approaches is a video guitar lesson presented by Massimo Varini and is sourced from Rhythm Motifs.
Let's look at an example of a riff that leaves little room for innovation. So we have to intrude into the few spaces left free by the riff (which has bass and guitar in unison). Some of these intrusions can become a riff within the riff!