血盆大口

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.

盆 = 分 + 皿 : Pinocchio (p) wants to improve his stereo and thinks of using a shallow bowl (皿) as a sound bowl. To find out its natural frequency he has a flower pot (盆) roll inside the bowl to and fro and stops the periodicity using a stopwatch (分) in the encampment's kitchen ((e)n2).

大 = 一 + 人 : The big (大), huge (大) robot (mnemonic symbol for 大) is working out in the ashram's bathroom (a4). He's lifting a flute (一) to which Don Quixote (d) and Neanderthal man (人) are clinging.

Mnemonic symbol: 口 shall be represented by a mandarin. Karl Marx (k-) is enjoying a mandarin in the outhouse's living room (ou3).