Of cause & effect amidst unseen forces

Imagine prehistoric man, they have not yet discovered the wind.
Nevertheless the wind exists.
Imagine they are out grazing in the plains, when some unseen force lifts their loincloth.
They look behind them. Nothing is there…
As they continue to collect their food, the phenomenon persists.
If we watched from a birds eye view, at this man turning rapidly, as though attempting to catch a ghost in the act (of course having no concept of haunting either), we would think he was crazy, mad.
We might even sigh carelessly in his direction.
Everything we do has a reason.
Everyone is responding to the breeze.