城乡

城 = 土 + 成 : Again Charlie Chaplin is unable to exit engine. There is a wall of dirt blocking the entrance, and a progress bar showing that it will be removed soon, but the bar seems to be stuck.

乡 = 幺 + 丿 : Mnemonic symbol: a tractor.

乡 = 幺 + 丿 : Marie Curie's tractor got stuck in a pile of bananas in front of the anglepod, with the wheels spinning helplessly. Her last hope is that she'll be able to free the tractor by pushing aces under the wheels, so that she can bring the tractor back to her hometown.