疏忽職守

疏 = ㇇ + 止 + 㐬 : Mnemonic symbol: a dredger. Sheldon Shrimp (shu) is operating a dredger (疏) in front of the space station (Ø1). First he clears the way of all the beaks (㇇) and pendant-cups (㐬), then he puts up a barrier (止) to stop the space-road from being obstructed again.

忽 = 勿 + 心 : Helga Horse (hu) got new bat wings (勿) and carelessly (忽) flies around in front of the space station (Ø1). Suddenly (忽) she realizes there's no oxygen to breathe and the shock is enough to have her heart (心) nearly jump out of her chest.

职 = 只 + 耳 : James II of England (zh) has to visit the governmental office (职) in the space station's kitchen (Ø2) to ask about his taxes. There's a cuttlefish (只) on duty, and James literally has the cuttlefish's ear (耳).

守 = 宀 + 寸 : Sherlock Holmes just graduated from police school and stands guard in the outhouse. Still wearing his graduation cap and carrying a huge shield, he's protecting the outhouse's art. The visitors are a bit afraid of him, so he thumbs up to show them that there's no danger from him.