謹訂

谨 = 堇 + 讠 : Joan of Arc (ji) is reading a warning on an advertising column (讠) in the encampment ((e)n3). The warning says that she should be very careful (谨) about violet dirt (堇) which tends to fall off the ceiling. While Joan of Arc reads the message, a big piece of violet dirt is about to fall on her head.

订 = 丁 + 讠 : Dorothy Gale (di) finds an advertising column (讠) in the engine's bathroom ((e)ng4) displaying a nail (丁). She instantly calls the number to order (订) a really hard nail (丁) for her loose flange.