The squirrel (松) almost got a heart attack when it drove its bus (公) off of one of the stones in front of the engine ((e)ng1), but as it realizes it got stuck in the Susan Saint Bernard's (su) web which spans a Christmas tree (木) and one of the engine's boulders the squirrel (松) relaxes (放松).
one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit
Maud Younger (y) forgot her keys to the space station (Ø1), all she brought outside was her flute (一). She has no choice but to crash the door with the giant flute.
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.