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).
foot / leg (of an animal or an object) / base (of an object) / CL:雙|双[shuang1],隻|只[zhi1] / classifier for kicks
脚
=
却
+
月
:
In the aorta Joan of Arc wanted to play a prank on the moon and kick him in the ass while he's inattentive for a second, but when she kicked him she just hurt her foot, and the moon didn't even notice. Silently, she retreats for now, limping on her hurt foot.