As promised, Sonny Boy Williamson who to my mind is the #blues and very possibly the greatest blues harmonica player ever, often playing it stuck lengthways in his mouth.
Never constrained to the regular 12 bar blues format he would just make changes as and when he felt it was right, one of the first songs I heard by him was "Bring It On Home" which shows his disregard for 12 bar convention perfectly. Unfortunately I was not able to find a video of that song that I was aloud to post here, but if you like this I recommend that you search out more of this great bluesmans work.
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