There is no single confirmed source for this version of my heart skips a beat, which is common for short user-uploaded soundboard clips that circulate as anonymous romantic reactions. The phrase itself is a long-standing English idiom for sudden infatuation, so creators reach for it whenever they need an instant lovestruck cue without dialogue. It shows up in crush POVs, couple edits, fan cams and cute animal videos, where the heartbeat layer sells the feeling in under three seconds. Its brevity keeps it reusable across trends.