紅豆

红 = 工 + 纟 : Mnemonic symbol: a little red book.

Helga Horse (hu) is reading the little red book (红) in the engine's kitchen ((e)ng2), when she discovers that it is being eaten by a silk worm (纟). She overreacts a little and wants to beat the silk worm with a steel beam (工).

豆 = 䒑 + 𠮛 : Don Quixote (d) is posting a scroll (𠮛) in the outhouse's bathroom (ou4). He's advertising beans (豆) out of which weed (䒑) will grow.