胸
=
匈
+
月
:
Xu Xian (xu) noticed Bela Lugosi (匈) is just going out when the full moon (月) is shining at the night sky and suspects that he is a vampire. Therefore, he plots against Bela and one month later, he rams a stake into Bela's chest (胸) in front of the engine ((e)ng1). Bela just feels a little chest (胸) pain but nothing more, since Xu Xian missed his heart.
flank (the side of one's torso) / to coerce / to threaten
胁
=
办
+
月
:
Marie Curie (xi) started a new business (办) in the elevator's kitchen (e2) offering gymnastic practice which helps to relieve tension in one's flank (胁). At first she offers the moon (月) to participate, but as the moon declines she threatens (胁) him with an impressive gymnastic move.