The most famous (or infamous) sequence in Batman v Superman: Dawn of Justice comes along just after Batman has bashed Superman over the head with a washbasin. Weakened by Kryptonite gas grenades, the Man of Steel (Henry Cavill) gasps that Lex Luthor has kidnapped his mother, Martha. “Why did you say that name,” roars the Caped Crusader (Ben Affleck). His own mother, you see, was called Martha, too.
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