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.
勃
=
力
+
孛
:
In the observatory's kitchen (o2) Beelzebub (b) pushes a power button (力) on a comet (孛) and suddenly (勃) the comet changes into a flourishing (勃) flower garden.