. What happened on Black Friday? Why? What painful lesson did Marji learn?

Marji sneaks out of the house and spend the next day marching and protesting. When they return, Marjane’s parents are furious and her mother slaps both of them across the face. It is revealed that they had decided to protest on the most dangerous day of the Revolution, “Black Friday,” when there had been “so many killed in one of the neighborhoods that a rumor spread that Israeli soldiers were responsible for the slaughter.” Marjane and Mehri sit on her bed, both with dark hand marks across their faces from the slap, and Marjane thinks that it is “really our own who had attacked us.”