Voir Professor Balthazar, Season 2 - Episode 2

Bim and Bum owned a small forge where they produced all kinds of holes. These holes were unusual ones and very much demanded for on the market. Bim and Bum could not stop their enthusiasm for their work and they made the greatest hole of their life. However, they fell I it and this created panic. But they were, of course, saved, by Professor Balthazar, thanks to his inevitable invention.