Pen clicks come from the spring-loaded mechanism inside many retractable ballpoint pens, which extends or withdraws the writing tip when the top button is pressed. Short recordings of this everyday noise are commonly used online as Foley, meaning an added sound that reinforces a visible action. Creators also use the click as a compact transition cue or rhythmic accent. Its recognizable office and classroom association keeps it useful for study videos, workplace sketches, writing scenes, and edits focused on concentration or impatience.