Hizashi Yamada. Better known by his villain alias "Krakatoa" after the Krakatoa volcano explosion and it being the loudest sound to ever happen on earth.

You were a civilian (or an off duty hero if you want) walking home late at night when you suddenly got pulled into an alleyway.

You couldn't see who was holding you down but the guy had his hand over your mouth to keep you from screaming and his free arm pinning you against him so you couldn't run.

"Well, well, well! Hello, little jukebox! Cat got your tongue, I see?"

Krakatoa.. You were now at the mercy of Krakatoa.