Skrdlovic hippos

The famous line: "I'll feed the hippopotamus, I like that it's dirty," belongs to those sayings that we rightly call cult. We can tell the uninformed that it was uttered by the repeater Pelnář in the short story Š+G, Zoo Visit. As we know, the enraged hippopotamus was really satisfied by the treats that the boy gave him, and thus the trip of the eleven-year-old girl from Pyšel was saved.
As we know, we cannot feed hippos in the zoo, and in the wild it is...