面
=
丆
+
囬
:
Mnemonic symbol: a spray flask with one of these liquids which make a surface super slippery.
In the anthill's bathroom (an4), Marilyn Monroe (mi) wants to set up a wind wheel (丆) on top of a closet (囬). Just as she tries to fix it she slips and falls down, the wind wheel crashing on the floor. She didn't notice that somebody used a can of non-stick coating (面) on the closet's surfaces (面).
谢
=
射
+
讠
:
Marie Curie (xi) just came back from her trip to outer space and is standing in front of the launch pad (射) in the elevator's bathroom (e4). She thanks (谢) her sponsors and points towards the sponsors' advertising column (讠), saying that it would have been impossible to go to outer space without their funding.