While used everywhere now, the most famous "Nani?!" meme comes from the 80s classic Hokuto no Ken (Fist of the North Star).
For a heartbeat, there was total silence. Jiro’s smug grin faltered. "What? That’s impossible! I didn't feel a—"
In the world of anime, few things are as iconic as the dramatic sound effect. While it literally translates from Japanese as "What?", it has evolved into a global symbol for shock, disbelief, and the ultimate "checkmate" moment in an action sequence.
Jiro shrieked, his voice cracking with pure disbelief.
Suddenly, a high-pitched, shimmering sound effect rang through the air. A bright red aura flared around Jiro’s body, and his eyes widened to the size of dinner plates.