Cymbals have long been a staple of orchestras, marching bands and drum kits, where a crash cymbal is struck to mark an accent, a climax or a sudden change in mood. On soundboards and in online video editing, that same single hit has become a handy standalone effect because it is instantly understood without any words or context. Creators drop it into memes, sketches and reaction videos to signal surprise, triumph or embarrassment, and its short length makes it easy to loop, trim or layer under other clips.