Mickey Mouse debuted in Steamboat Willie in 1928 and became Disney's mascot, known for his falsetto voice and cheerful laugh performed originally by Walt Disney himself. That distinctive ah ah chuckle has been imitated in cartoons, toys and online clips for decades, detached from full episodes as a standalone reaction sound. Short cartoon laughs like this spread on soundboards and short video platforms because they are instantly recognisable without dialogue, letting creators add a familiar playful character to otherwise unrelated footage in just over a second.