Bill Murray built his reputation in comedy films where a deadpan reaction often got a bigger response than the joke itself, and short clips of his laugh have circulated online for years as a ready made reaction. This version spread through Spanish language soundboards under a title meaning Bill Murray laugh, which helped it reach meme editors beyond English speaking audiences. It stays popular because the laugh is recognisable without any setup, works at low volume under dialogue, and signals amusement without sounding forced or exaggerated like many canned effects.