The next sentence: La cuenta, por favor.
When your waiter hears this, he laughs (la – the German “lacht” means “laughs”) and goes out to make up the bill. He comes back riding a cow (cu – the German “Kuh” means “cow”), and in front sits a duck with the bill in its beak (en – the German “Ente” means “duck”), which it drops into your cup (ta – from the German “Tasse”, “cup”). Then they all leave through the gate (por favor).