魔术

魔 = 麻 + 鬼 : Mahatma Gandhi (m) wants to become a famous magician (魔) and practices in the observatory's kitchen (o2). He has a demon (鬼) tie him up using hemp fiber (麻). His magic (魔) trick will be to undo the ties just using his teeth.

术 = 丶 + 木 : Mnemonic symbol from 手术: surgeon.

In the space station's bathroom (Ø4) the surgeon (术) wants to tickle Sheldon Shrimp (shu) with a petal (丶), but Sheldon thinks it's a trap and he wants to cut him open, so he hides behind a Christmas tree (木).