Nani_ses_efektianime -

Before he could take another breath, Jiro’s own power rebounded against him. With a final, dramatic explosion of light, he was sent flying backward into a stack of empty crates, defeated by a technique he never even saw coming. Why "Nani" is So Helpful to Know

Jiro stepped back, wiping sweat from his brow. "It’s over," he sneered, adjusting his leather jacket. "I’ve hit you a dozen times. You should be nothing but a pile of dust by now!" nani_ses_efektianime

Here is a helpful story that brings this classic anime trope to life. The Legend of the "Nani" Moment Before he could take another breath, Jiro’s own

Ken stood perfectly still, his eyes closed. He didn't even seem to be breathing. Then, slowly, he opened one eye and spoke the words that have chilled villains for decades: (You are already dead.) "It’s over," he sneered, adjusting his leather jacket

For a heartbeat, there was total silence. Jiro’s smug grin faltered. "What? That’s impossible! I didn't feel a—"

"Nani?!" is almost always used when a character realizes their opponent is vastly more powerful than they expected.

Jiro shrieked, his voice cracking with pure disbelief.