Deku says this to Bakugo after attempting to rescue him from the Sludge Villain, long before either of them even started training to be heroes. It's the first indication of the heroic spirit that ...

Deku's final punch against All For One parallels ... All Might was shown battling against a terrfying villain with a Sludge Quirk. To end the battle once and for all, Toshinori punched the air ...