Cymbal swells are a staple of film scores, trailer music and comedy editing, where a rolling crescendo on a crash cymbal signals that something big is about to happen. They became a soundboard favourite because the build-and-crash shape works like a timer for the viewer's attention, promising a payoff at the peak. Online, creators use this exact kind of short swell as a transition effect between scenes, over big sports moments, or as a sarcastic drum-roll style accent before an obvious statement or failed attempt.