Penny Fitzgerald's funny laughing clip has found its main life online, where short reaction sounds are shared, remixed and reused across memes, short videos and prank edits. Its appeal is simple: a real-sounding laugh is easy to place, instantly understood and works without any context or dialogue. That flexibility has kept it in rotation for creators who need a quick human reaction rather than a cartoon effect. It sits alongside other instantly recognisable laugh clips such as Woody Woodpecker Laugh, giving editors a warmer, more natural alternative when a scene needs genuine amusement.