The windscreen wiper.

I have learnt a most useful german gesture: Der Scheibenwischer ("The windscreen wiper"). The meaning is described here in german, and a quick translation is

Move your hand to and fro in front of your face. It looks like the windscreen wipers on a car. This gesture means "You must be crazy!".

I'm writing about this because Sascha Dum, a footballer with Alemannia Aachen, received a red card (video here, 3:40 in). Most neutral observers seem to think that only half a wiper cycle in the direction of the referee warrants only a yellow card, and that a red card should be reserved for a full double-cycled (left-right-left-right) wiper movement.

I wonder what happens if a player does this in an international competetion. What would a south american referee make of it all?