Mnemonic symbol: as in the movie "Up", someone will be using lots of balloons to send something on a long journey. Sherlock Holmes (sh) prepares to take off in the anglepod's bathroom (ang4). He fixed a lot of balloons (上) to a flute (一), on which he plans to sit during his journey. At this moment the flute is only held back by the 90 degree corner clamp (丄) which is fixing it to the ground.