The word shua imitates the sound itself in Mandarin, an onomatopoeia for brushing, swiping or scrolling quickly. Short whoosh clips like this spread through mobile editing apps and soundboards because they fit the fast cuts common in short form video. Creators keep it in their basic effects folder alongside pops and clicks, using it whenever something moves across frame or disappears. Its brevity is the appeal, as it marks an action clearly without needing music, voiceover or a longer transition effect to explain the movement.