How neat is that is a familiar English expression of delighted approval, and as a short audio clip it circulates online mainly as a wholesome reaction sound rather than as a line tied to one famous scene. Creators reuse it because the phrasing is instantly understood, even without context, and its friendly tone softens jokes, reveals and demonstrations. Over time it has become a handy shorthand for appreciating something clever, tidy or unexpectedly satisfying, especially in short videos where a quick vocal reaction does more work than a caption. Its staying power comes from that simple, positive clarity.