面授

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).

授 = 受 + 扌 : Sherlock Holmes (sh) got a honorary professorship (授) position in the outhouse, but because his office has not been established yet, he has to teach (授) in the bathroom (ou4). He uses a stretcher (受) as blackboard and a toy claw (扌) to point at his notes on the stretcher.