Not the best quality, and it picked up a bit of string click, but yeah this is just some blues improv over a cool backing track i found.
[VIDEO]http://www.youtube.com/watch?v=i79rp6ZPXaY]Blues Improv - YouTube[/VIDEO]
I really liked your note choice in this piece. The fast run around 3:50 especially added to the build up to the end. Just slow down that vibrato! Make it more smooth & less like a bee buzzing. Very nice overall though... nice work!