血肿

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.

肿 = 中 + 月 : The moon (月) and Julian Giant Squid (zhu) are playing darts inside of the engine ((e)ng3). Right in his first turn Julian Giant Squid doesn't hit the dart board (中), but instead hits the moon's eye which starts swelling (肿) and develops into a tumor (肿).