Because the bag is semi-rigid yet collapsible, its center of gravity shifts constantly as it tumbles. This creates the signature "dancing" motion—sudden vertical leaps followed by spiraling descents. The Symbolism: Beauty in the Mundane
In literature and film, a paper bag in the wind often serves as a "liminal" object. It exists between two states: It once held bread, milk, or a school lunch.
The bag represents the ultimate state of "letting go." It cannot fight the wind; it can only go where it is taken. This is often used as a metaphor for fate or the human condition.