For one thing we knew it was a dream. Meant to set us up for Sasha's death. I had no doubt he would be giving us another line to remember by the end of the episode.

I am of the mindset that it was not a dream, that it was simply sasha reliving that fateful day.  at first I thought "dream" but when she said "maggie can take care of maggie" that's when I let go of that idea.

My take is that she is remembering her conversation with Abe when he reminds her that they choose to make sacrifices, to fight, not for themselves but for others.  He tells her he knows she regrets saying those words about Maggie.  That was such a beautiful way to let us take a look inside Sasha's heart.  A glimpse that revealed why she has been so adamant about protecting Maggie, about keeping Maggie and the baby safe.

I think she was reflecting back on that moment in time with Abraham to pull strength from his words, to be able to take that pill and sacrifice herself  for her family, knowing that her sacrifice would not be in vain.

have you watched the talking dead?

Plus she kept mumbling things Abe said that day while she was in the box.

I thought it was so cool with him showing up. Having both of them there for her last show to talk about those scenes was very appropriate. I was glad that she felt that was a fitting way for her character to go out. 

My first reaction was "With all of the technology at your disposal you play a taped recording of him?" And then Cudlitz came out and it was all good. Lol.