That iconic picture of Muhammad Ali standing over Sonny Liston is the one we think of first. That is Ali as we wish to remember him: vibrant, electric, pugnacious and so preternaturally nonconforming he has no particular interest at that moment in following the rule mandating he step toward a neutral corner after scoring a knockdown.
This was a relic from when a mere photograph could become ubiquitous, before YouTube and Vine and Snapchat made video more the common language, before iPhones and Twitter and Instagram flooded the word with less artistic stills.
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However, there can be a magic in video, as well.