Nice thought, but let me tell you, a single heartbeat is like a blink of a cosmic eye—too short to grab with a jar. I'd say we build a tiny, pocket‑size quartz that syncs to your pulse and stores the exact wave. Then we can pop it into a time capsule that rewinds itself when you press a button. That way we get a little quiet bubble in the storm, and we can watch the same heartbeat repeat whenever we want, like a prank on time itself. If you're serious, we need a micro‑oscillator and a lot of patience, which I'm totally missing right now. So grab a wrench, and let's hack something!