白日做夢

白 = 丶 + 日 : Mnemonic symbol: a white flag. The sun (日) is waving with a white (白) flag (白) in the airplane's kitchen (ai2) while Beelzebub (b) is beating them with a big petal leaf (丶).

日 = 囗 + 一 : Robinson Crusoe (r) is hiding from the sun (日) in an enclosure (囗) full of flutes (一) in the space station's bathroom (Ø4).

做 = 亻 + 故 : In observatory's bathroom, Zapatista Zebra uses the well in the middle of the room as an old tomb and throws a dead Rosa Luxemburg inside to hide her corpse.

梦 = 夕 + 林 : Mahatma Gandhi (m) once had a very strange dream (梦). He was occupying the engine's toilet ((e)ng4) and saw bats (夕) sitting in the forest trees (林) surrounding him. Suddenly he came to the realization that just like the bats occupying the trees, people could reclaim the streets through sit-ins. Gandhi was so impressed by this dream that he dedicated his life to this mission.