Episode 13 is probably one of best episodes of TV I've ever seen. Right up there with Ozymandias from Breaking Bad. All the political / controversial / emotional hits are perfect.
Episode 12 and 13 spoilers.
I thought Poussey was going to be okay right and medical quickly appears to resurrects her. I thought she would walk outside surprising everyone that she's alive. Sadly she died. She had quite the journey back in New York when Poussey is trying to meet with her new friends, but went through complications since her phone got stolen. From there, she made new friends and had fun at an unusual party and bike rides with pretend monks to the beach. It was very humanizing of Poussey to see her smiling at the audience (us) before season 4 ends. RIP Poussey, one of the most pure, innocent inmates.
Me and my G/F think this whole scene wasn't her past, but the afterlife. I remember she said in a previous Season her perfect place was New York. This is her "Heaven." Her breaking the fourth wall and smiling at the end is basically showing that she's happy to finally be free from the prison, life and has ascended beyond the show.