LEGO Ninjago launched as a toy line and animated television series in 2011, following young ninjas training under Master Wu in the world of Ninjago. Its mix of martial arts action and broad comedy made its whooshes, impacts and exaggerated reactions instantly recognisable to fans. Clips isolating those funny sounds began circulating on soundboards and in fan edits, where creators reuse them as a shorthand for slapstick ninja action. The effect remains popular because it signals playful, kid-friendly humour without needing context from a specific episode.