不備

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

备 = 夂 + 田 : Beelzebub prepared a field of high heels in the Eiffel Tower's bathroom. He wants to shock any person entering the bathroom with society's expectations towards what people should wear on their feet.