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.
斩
=
斤
+
车
:
Mnemonic symbol from 斩草除根: lawn mower. James II of England (zh) accidentally dropped bar bells (斤) onto the anthill's owner's cabriolet (车). The owner is mad as hell and wants to behead (斩) James II of England in the living room (an3) using a lawn mower (斩).