One of the following is NOT a clue or indication in the one leg stand test:

The correct answer is the choice that indicates an item that does not serve as a clue or indication during the one leg stand test, which is designed to assess a person's balance and coordination, often in the context of impairment due to alcohol or drugs.

In this specific context, swaying, hopping, and putting a foot down are all observable behaviors that indicate a lack of balance or control, suggesting a potential impairment. When a subject sways, it demonstrates difficulty maintaining stability, and hopping indicates an inability to balance on one foot effectively. Similarly, if a subject puts their foot down, it suggests that they are unable to maintain their balance during the test.

Improper footwear, while it may affect the test's execution or comfort, is not an indicator of the subject’s physical capabilities or impairment level. It does not provide information about the person's balance or coordination. Therefore, it does not fit as a clue in the context of assessing impairment during the one leg stand test. This is why it is the correct selection for the item that does not represent a clue or indication in this specific testing scenario.