Mulla bought a heavy sack of potatoes and loaded it onto his donkey. He hopped on the saddle, but as they walked, the donkey started groaning under the weight. "Ah, I know why you're struggling," Mulla said. He turned around so he was riding backward, grabbed the sack of potatoes, and held it up in the air in front of his chest. "There! Now the weight of the potatoes won't bother you, and you can walk in peace."