Disruptions and revolutions are quick and often violent, but I wonder if structurally what happens in these situations is the spontaneous replacement of an old central structure (the shaft) with a new exoskeleton (the housing of the engine itself) that can contain an energetic process of a higher order than the old structure could metabolize.

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People such as musician Isaac Hayes, best known for recording the theme to the 1970s movie Shaft or, for the younger set, for portraying Chef on Comedy Central's South Park.

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