* While yes, Saitama can NOW kill monsters with a single punch, perhaps his greatest moment of badassery so far is in the second issue, during the flashback of his fight with a crab monster. This is when he was just an ordinary guy with no powers. Said monster is initially wiping the floor with Saitama, until Saitama loops his necktie around one of the monster's eyes, and rips it out.
* The "Sparring" two parter with Genos. Genos goes for a massive blast that Saitama appears to dodge, but Genos was expecting that and charges at him landing a rain of punches that tear apart the side of a mountain just as his previously fired blast hits. Only for him to discover that what he tackled wasn't Saitama but an [[SpeedEchoes after image]].
** How does the spar session end? [[spoiler: Adhering to the rules not to hold back, Saitama prepares to [[http://www.mangareader.net/onepunch-man/18/10 punch Genos]] but pulls back and hits him with a forehead flick at the end. The after effect of his attack still manages to destroy the mountain behind the two completely.]]
* For a manga that deconstructs shounen tropes, it still managed to play one straight: namely, Saitama telling a Class-B Hero to [[{{Determinator}} never give up on working hard to advance beyond their limits.]] [[spoiler: This is after Saitama kills a [[OurDemonsAreDifferent giant propeller fan]] with one punch that a previous S-class hero (ranked 2nd) didn't completely destroy after it wiped out the B-rank hero's similarly ranked comrades.]]
* Saitama gets ''another one'' when [[spoiler: after destroying the meteor, two B-class heroes try to ruin his reputation, then attempt to [[BullyingADragon execute him in public.]] While the result [[CurbStompBattle was obvious]], his speech on why he's a hero in the first place was just awesome.]]
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