Chapter 140:
This chapter ties so many things together, including the rest of the glimpses into the past. We salute you, Yukimura Aguri-sensei. It is because of you that the Grim Reaper was able to become a Human. I love how symbiotic Korosensei and Class E are. It's not just him who gives them something, the students are also unwittingly giving something precious back to Korosensei.
The one who laments his strength http://www.mangahere.co/manga/ansatsu_kyoushitsu/c135/19.html http://www.mangahere.co/manga/ansatsu_kyoushitsu/c005/3.html
Ever since his one-handed Clap Stunner, the thought that "Korosensei deliberately weakened his lethality" had crossed my mind. So it really is the case. Korosensei = Kenshin.
Back in Ch 125, it was implied that Korosensei was someone "who laments because of his strength" ("lament" got mistranslated). Now we see the full extent of this sorrow.
Using one's skills properly Another key word of this chapter is "use". Noticed how it's been used so many times?
http://www.mangahere.co/manga/ansatsu_kyoushitsu/c097/20.html http://www.mangahere.co/manga/ansatsu_kyoushitsu/c110/4.html http://www.mangahere.co/manga/ansatsu_kyoushitsu/c114/17.html
Another prevalent theme of AC is that whether a talent/skill becomes good/bad all depends on how their wielder "uses" it, and for whom. It is in the this chapter that Korosensei learnt his lesson of "improperly" using his many abilities, and became a lesson that he passed onto Class E, to not make the same mistake. It shows just how proud he is that Nagisa chose to use his dark talents for good
So, has this flashback managed to top the Harukawa/Setsuna flashback from Neuro? My answer, YES!! A double octopus circle! After two months, we're finally back in the present. I cannot wait to see Class E's reaction, especially Kayano's.