Naofumi Iwatani is the lead of The Rising of the Shield Hero, a light novel series adapted into an anime in 2019. Falsely accused early in the story, the character is defined by distrust and suppressed rage, so his rare outbursts became memorable moments for fans. Clips of his scream were cut from emotional scenes and shared on soundboards alongside looser clips like anime ahh. It remains popular because it signals a complete emotional breaking point, not just surprise, making it useful far beyond the original series.