砭灸术

灸 = 久 + 火 : Joan of Arc (ji) is preparing for her next battle with a moxibustion (灸) session in the outhouse's living room (ou3). She needs to wait for the hourglass (久) to run out before she can put out the fire (火) on her back.

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).