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This image has made the front pages because it is exciting. Its violence is liberating to contemplate, in a dangerous, Dionysian way
The ancient Greeks mythologised the irrational, savage, destructive side of the human psyche in stories of the wine god Dionysus and his crazed followers.
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Down the centuries, pictures of social protest have summoned up those same wine-dark powers
or recognised them in moments when the quiet of the city is turned inside out
and all the suppressed antagonisms of daily life explode in riot.
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http://www.guardian.co.uk/commentisfree/2010/nov/11/student-protest-photo-dionysian-desire