不兴

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.

兴 = ⺍ + 一 + 八 : Mnemonic symbol from the shape of the character: a sea star. Xi shi (xi) and a sea star (⺍) have a strong desire (兴) to smoke catnip (⺍) through a flute (一), so they hide in the engine's bathroom ((e)ng4) to crush the catnip with an eight-ball (八) and smoke it. Shortly afterwards they relax and loose all their excitement (兴) and interest in anything (兴).