Construction worker joke in Germany

We have always been taught that Germans don’t joke. And for a long time we were used to that assumption. In fact, we were mad at the Germans for stealing your grandfather’s bike. And playing against the Germans was no fun either, because you only knew whether you had won or lost when the team was back on the bus to Germany. But years later it appears that some of our neighbors do indeed possess a sense of humour. Although Hans who wanted to do a big errand at work probably can’t laugh at it.