血債

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).