闊氣

阔 = 活 + 门 : Karl Koala (ku) wants to live a rich (阔) and wide (阔) life (活). To this end he installs a wide (阔) magical trap door (门) in the observatory's bathroom (o4) which will lead him to wide landscapes.

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.