Deku, the hero-in-training Izuku Midoriya in My Hero Academia, inherits the powerful Quirk One For All and learns to control it through Full Cowling, spreading its energy evenly through his body instead of breaking his bones with a single uncontrolled burst. At 100 percent the technique reaches its most intense form, producing the kind of explosive impact heard in this clip. Fans have lifted the sound from fight scenes and reused it across anime edits, AMVs and reaction videos, where it instantly signals a hero going all out.