射击学

射 = 寸 + 身 : Mnemonic symbol: a rocket launch pad.

Sherlock Holmes (sh) is ready for takeoff in the elevator's bathroom (e4) and stands on of the launch pad (射) taking a final shower. As there are many journalists, Sherlock prepared to be extra fancy and wears a tight body suit (身). He smiles at the photographers and shows them a thumbs up (寸).

击 = 凵 + 扌 : Joan of Arc (ji) locked herself out of the space station again. In front of the space station (Ø1) she tries to break (击) the door open using her electric mortar (击). The mortar has to be a few meters away from the door but the receptacle (凵) for its cord is right next to the door, so Joan of Arc plugs the mortar in using a toy claw (扌).

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.