Mnemonic symbol: a Nordic walking pole.
Zorro (z) is fighting Neanderthal Man (bottom of 龰) in the outhouse's living room (ou3). Neanderthal Man uses his pennant (top of 龰), and Zorro uses a Nordic walking pole (走). Zorro overcomes Neanderthal Man by using a dirty trick: he throws some dirt (土) at Neanderthal Mans face, who is blinded and hurts his foot with his pennant (the pennant pierces his foot: 龰). Just at this moment Zorro uses the opportunity to sedate Neanderthal Man and rams a syringe (龰) into his shoulder.