While singing 'Träume aus Samt und Seide' the duck Eulalia is tickling Norbert in the face and he is heard laughing but the last second of his singing voice in the line is still heard too.
Where did Möps got the booze bottle from, in the scene where the boys want to butcher Eulalia, when Norbert didn't bought anything and the bottles were thrown away earlier?
Hanna's name was not mentioned at all, it was only known by Norbert. How did Möps and Bernie knew that name? It is very unlikely that he told it to them, cause of the oath. And they are never showed anyplace else except for their house.
When offering going on holiday to Möps, Bernie is asking him if he could imagine Norbert without girls. How did he know that this is Norbert's idea of holiday, when he didn't brought it up to any of the guys yet?