The scene in question comes in the third act of Batman v Superman. The two iconic DC heroes finally come to blows, and it looks like Ben Affleck’s Caped Crusader is gearing up to deliver the final blow. Superman begs him to “save Martha”, as Diane Keaton’s Martha Kent was previously kidnapped by Lex Luthor. This triggers an emotional response from Batman since his mother shared the same name, and the scene has since become the subject of countless memes. Zack Snyder recently explained his idea behind this scene as a storyteller, saying:
Article source: https://www.cinemablend.com/news/2493545/zack-snyder-explains-batman-v-supermans-infamous-martha-scene