出

出 = 屮 + 凵 : Mnemonic symbol: 出 tilted 90 degrees looks like "EE". "EE" is an abbreviation for "emergency exit". In front of the space station (Ø1) Chantal Chicken (chu) plugged her thornbush (屮) into a receptacle (凵), but it short circuited and immediately caught fire. Chantal has no option but to use the emergency exit (出) she came out of to go back into the space station.

Mnemonic symbol: receptacle as in wall plug.

Karl Marx (k) wants to recharge his phone in the anthill's living room (an3), but he can't find a receptacle (凵).

I don't know but somehow I have to think of a thornbush when looking at this character. Maybe because it looks so spiky. To make things interesting let's say this represents a burning thornbush talking to people. The burning thornbush talks to Charlie Chaplin (ch) in the elevator's bathroom (e4) and tells him what to do, but Charlie won't listen.

山 = 丨 + 凵 : Mnemonic symbol: 山 looks like the tip of a fork. Sherlock Holmes (sh) is climbing a mountain (山) in front of the anthill (an1). He uses a dinosaur bone (〡) as walking stick, and to have better grip he attached a fork (山) to its tip. Unfortunately he accidentally sticks the fork into a receptacle (凵) on the ground of the mountain and gets shocked.

Mnemonic symbol: the character 彐 looks a bit like a pig snout seen from the side. If you need to type it, remember its pronunciation ji4 by imagining Joan of Arc wearing a fake pig snout in the space station's bathroom and making grunting and squealing sounds.