Returning to an occasional coke out of necessity after swapping to other sodas is a bizarre experience. It really has a strange taste. Not even necessarily bad, but strange. But if you return to it for a few weeks, you stop noticing it.
Mabe it's me, but I don't see disgust like I've previously read about in the "history" between La France et Coca-Cola, I see a curious surprise with a mild shock of the utterly unexpected.
Imagine the flavor of Coca-Cola being that alien in your life.
I guess that you must be French then, because to me, as a Scandinavian, that man looks disgusted. Like he's about to ask why he was handed battery acid for a refreshment.