勒
=
力
+
革
:
Sir Lancelot (l) constructed a mechanical bull in the elevator's bathroom (e4), mainly just using a cow's hide (革) and a power button (力). To rein in (勒) the wild mechanical bull he presses the button and rides the bull again and again.
紧
=
収
+
糸
:
In the encampment Joan of Arc is very tense to finally open her present. It is a radio receiver which has been tightly packed in fine silk. Finally when she's finally allowed she urgently opens the package.