煤层气

煤 = 某 + 火 : Mahatma Gandhi (m) is looking for some food in the Eiffel Tower's kitchen (ei2) when a fire (火) breaks out at the coal (煤) store and blocks the way down. To stay calm Mahatma Gandhi grabs a ukulele and plays "somewhere over the rainbow" (某).

层 = 云 + 尸 : The King of Chu (c) is enjoying a lasagna (千层面) in the engine's kitchen ((e)ng2) when suddenly a ghost (尸) surrounded by a dark cloud (云) appears and starts to haunt him. Terrified, the King of Chu drops the lasagna and runs away. The ghost reached its goal and starts devouring the lasagna himself.

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.