If you improvise a riff and the crowd immediately reacts to it, you know you're on to something.

- Dimebag Darrell

To be a truly conscientious artist, you have to look at what's not working and challenge it. You riff on things.

- Kara Walker

You would find in a lot of Zep stuff that the riff was the juggernaut that careered through and I worked the lyrics around this.

- Robert Plant