The sound comes from Toy Story, the 1995 Pixar film, where Woody is the cowboy doll voiced by Tom Hanks. The short bah is part of his laugh, and clips of it began circulating online as a reaction sound because it captures a sheepish, goofy mood in under a second. It later became associated with the goofy ahh meme style, where exaggerated cartoon voices are used to mock awkward or overconfident moments. Its brevity makes it easy to drop into edits, and its link to a familiar childhood film keeps it recognisable years after the original movie.