What happen when flicked the cardboard?

When you flick cardboard, it can produce a sound due to the sudden movement and the release of tension in the material. The flick generates a quick, sharp motion that causes the cardboard to vibrate, creating a popping or snapping noise. Depending on the thickness and rigidity of the cardboard, this action may also cause it to bend or flex momentarily. The overall effect is a brief disturbance in the cardboard's position and structure.