Watch the C Bends online guitar lesson by Jeff McErlain from 30 Sweet Blues Licks You MUST Know
Here's a tricky one where I'm sounding chord tones from a note below via bending. This is a very, very cool technique to get under your fingers as it adds a whole other dimension to note articulation and expression. I've spent a lot of time working on this, and continue to as it's so important. Take your time to make sure each bend is in tune, which may seem easy, but believe me, it's not! But, it's fun as all get out to work on, and the payoff is immense.
Two players that were very influential to me who use this technique quite a bit are Jeff Beck and Roy Buchanan. Come to think of it, David Gilmour of Pink Floyd uses this technique quite a bit as well. By bending to a note from a half step below, we can get a full control over the pitch, which helps add an emotional element not achievable through a fretted note alone.