血债血偿

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.

债 = 亻 + 责 : James II of England (zh) had a great party. He wakes up in the airplane's bathroom (ai4) still wearing his party hat (责) to a very angry Rosa Luxemburg (亻) who wants to claim Jame II's debt (债).

偿 = 亻 + 尝 : Charlie Chaplin (ch) made a very nice dish in the anglepod's kitchen (ang2), but Rosa Luxemburg (亻) messed it all up by adding too many spices. To compensate (偿) for it she has to cook it all again, with Charlie Chaplin warily tasting (尝) the food from time to time.