Does anybody really understand jazz? Hands down, hands down – it was a rhetorical question. For me, it’s alll about mood, rhythm, sway and surprise. Good jazz changes your emotions and takes you places full of surprise and invention. That, I imagine, is what attracted documentary filmmaker Robert Mugge to his latest project, Saxophone Colossus, which is a portrait of legendary jazz musician Sonny Rollins Mugge, after all, calls Rollins “the greatest jazz improviser.”