吞聲忍氣

吞 = 口 + 天 : Tommy Turtle (tu) tried to swallow (吞) a whole mandarin (口) in front of the encampment ((e)n1) and is about to suffocate. Fortunately an angel (天) sees him struggling and rescues him.

声 = 士 + 尸 + 丨 : Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.

忍 = 刃 + 心 : Robinson Crusoe (r) cannot endure (忍) life anymore. In the encampment ((e)n3) he puts his heart (心) on the floor and is ready to end his life with one streak of his bihänder (刃).

Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.