This has been bugging me for a long time now. Saitama knows how powerful exactly he himself is. He knows how much power he has to use to flip a city sized indutrial facility. He knows how much power he has to use to deflect a planet buster beam attack and how much power he needs to knock on genos' head without bursting his whole body open. That means he knows how much power he himself holds. But someone can know his own limit only after trying it at least once.
What I'm trying to say is that, sometime in between those three years Saitama has to have used his full power somewhere on something/someone. The first thing we saw was vaccine man and that wasn't a serious punch. So...when did he used his full power? Is One gonna show anything more from Saitama's past or is it just gonna get ignored because this is a gag manga? Any thoughts on this...?