Watch the Elementary, Mr. Watson online guitar lesson by David Blacker from Swing Blues Survival Guide: Lead
This piece starts with a great melodic phrase that incorporates a half-step bend from the sharp V (on the B string) to the VI. This is a great use of dissonance bending into a sweet, major chord tone. The 7 & 8th measures employ some great movement up the neck, playing off the Bb major 6th triad on the 10th fret. The straight-ahead turnaround spells out either II-V-I or V-IV-I changes.