Watch the Power with Stops: Ex. 2a online guitar lesson by Andy Aledort from Kings of Blues & Rock Vol. 2: Albert King

A standard blues practice is for the band to play an expressive rhythmic figure in unison followed by silence, during which the guitar (or any soloing instrument, as well as a voice) drops in an improvised melodic idea. Albert Kings' recording of "Blues Power," from his classic album Live Wire/Blues Power, offers some of the greatest examples of this technique ever heard.
Across the first four bars of this example, just about every variety of bend-half-step, whole-step, one and a half-steps and two whole steps-is performed from the same high Bb fretted on the 11th fret of the B string. Albert's intonation was always perfect, so you will definitely have your work cut out for you.