Doris and Dieter Dubinsky supposed to be from from Bitterfeld and speak with a saxonian accent the whole time. Bitterfeld is a town in Saxony-Anhalt where they don't speak the deep saxonian accent that they speak in most parts of Saxony. However it is a running joke for most comedians to speak with such accent when portraying characters from East Germany, no matter if they speak the accent in the region or not, therefore it is intentional.
When the box in the harbor opens and the girl-group "No Angels" runs out of the box screaming, one member (Nadja Benaissa) can still be seen in the right-hand corner of the screen, trying to hide behind a pole. Her knee was hurt, so she couldn't run like the other girls.