You watch your feet
For cracks in the pavement
He lives in a town where people don’t interact much socially, they “watch their feet” instead of looking at or acknowledging one another.
Could also refer to how these people need everything tidy, without crack in the pavement.
OR OR or… “step on a crack, break your mother’s back.” These people are characteristically too timid to step on a crack, and question the saying.
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