Inglorious basterds?

Hierbij de engelse wikipedia entry over dit onderwerp. "In English-speaking cultures, when another person's fingers are being counted (that is, when another person holds up their fingers to signal a number), the count starts at the index finger (1) and goes to the pinky (4), and then the thumb is raised last to signal five. In German-speaking cultures, the thumb in the same context is counted as one and the count then proceeds from the index to the pinky. Thus, an American signaling for three drinks would raise his index, middle, and ring fingers, while a German would raise his thumb, index, and middle fingers.[1]
This was a major plot point in the 2009 movie Inglorious Basterds, in which an English soldier engaged in covert operations accidentally revealed his true nationality in a French bar in front of a German Gestapo officer."