Placing a shoe on one's head during a baseball game is a lighthearted, superstitious fan tradition born out of the classic baseball concept of the "rally cap." While traditional baseball superstition involves turning hats inside out or backward to spark a late-game offensive comeback, frustrated or playful fans expanded this concept by balancing footwear—such as sneakers or sandals—on their heads to invoke good luck, amuse fellow spectators, and reverse a struggling team's fortunes on the field.