閱兵式

阅 = 兑 + 门 : Yu the Great (yu) has to inspect (阅) a cash exchange booth (兑) in the elevator's bathroom (e4). He finds lots of problems and just as he is reading (阅) the rights to the owner, the owner opens a trap door (门) just below his feet to make him disappear.

兵 = 丘 + 八 : Brunhilde and the soldier visit a burial mound in front of the engine. It is round like a ball like the deceased inside. To commemorate the round fallen soldier they put up a big eight-ball.

式 = 工 + 弋 : I'll use a specific style as mnemonic symbol: 哥特式, gothic.

Sherlock Holmes and the goth are celebrating a Viking festival in the space station's bathroom. They don't have trunks to throw around, so they use a steel beam. They also celebrate by practising archery. In zero gravity it is easy for them to set one world record after the next.