脱下

脱 = 兑 + 月 : The moon (月) just had lots of cash exchanged at an exchange booth (兑) in front of the observatory (o1). Shortly afterwards the cashier finds that the moon's money is fake and grabs him to hold him up, but suddenly Tommy Turtle sheds off (脱) his moon suit and is able to escape (脱)

下 = 一 + 卜 : Mnemonic symbol: from the up/down logic, and a little bit the shape of the character, a ladder.

Xi Shi (xi) is on a retreat in the ashram. Using a voodoo staff (卜), she divined that next (下) week she'll have to play the flute (一) sixteen hours per day. Because she hates playing the flute, she climbs over the ashram's bathroom (a4) wall using a ladder (下) to escape.