King and Saitama with Elder Centipede were a fierce battle between the two characters of the Hero Association and an executive member of ...

King and Saitama with Elder Centipede were a fierce battle between the two characters of the Hero Association and an executive member of the Monster Association.

In the final episode of One-Punch Man Season 2, King saved Genos, Bang and Bomb one goal when he turned the attention of Elder Centipede - Elder Centipede from them to himself. Grasping the weakness of the monster Ra, King shouted at the announcement that he had brought Blast, the hero who had defeated him many years ago to attract attention.

After that, King continued to mock Elder Centipede's cowardice to lure Elder Centurion to attack him even though he was extremely frightened. It turned out that it was King's plan for Saitama to finish off the Elder Centipede with one blow, preventing it from crawling into the ground and retreating.

The Elder Centipede comes to attack King, when the distance is only a few steps away, Saitama appears from behind to perform a "serious punch" that causes the monster to fly in one note. It can be said that, unlike the previous killings, the wrong punch force used this time is too much, causing the centipede's body to melt into ash.
And in today's article, let's find out why Saitama used "serious punch" with Elder Centipede!

1) As the manga mentioned, Sai wants to release his pent-up frustration from losing to King in video games. If you look back on that segment you will know how Sai was mad when he lost to King.
Saitama shared that he really felt quite refreshed after defeating Elder Centipede, because he had been stressed before playing video games with King. Although King is skeptical about this explanation, it is probably the reason Sai uses a serious punch.

2) Saitama does not know exactly how powerful the Elder Monster is. Sai only hears from King that this is a monster who survived the battle with the top hero, (whom Sai never met and perhaps he believes is a strong Blast like me). The ability of the centipede to escape from the hero's hand and think that it is very strong, Sai decides to punch seriously.

3) Even if Saitama was confident that he could solve the Elder Centipede, as King said, if he didn't decide to finish it, the centipede's giant body would cause mass destruction. Sai did not want to repeat the mistake in the past, so he seriously punched the Aging to ash.

4) This last reason has nothing to do with Saitama's decision making, but because ONE author himself wants to. Saitama fights a monster that Blast has fought (and more importantly Blast has failed to destroy it), apparently this is the perfect opportunity to "measure" the power of Saitama and Blast. , but ONE doesn't want us to come to a conclusion. Blast failed to defeat the Elder Centipede, because he was trying to catch the monster and failed. Sai defeated the Elder because he was angry and wanted to finish off the monster in 1 hit.
Well, up here I said my thoughts and thoughts about why Saitama had taken a "serious punch" to a finish of the Elder Centipede right now.
Mr. Ruso