Mnemonic symbol: a Mohawk haircut. It fits the hair "to stand on end" and the character itself looks like a head with a Mohawk haircut facing towards the left.
James II of England (zh) tries out a Mohawk haircut (乍) in the ashram's bathroom (a4).
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.