It reminds me of when Carol's daughter Sophia died (the anguish and grief on Maggie's face when she saw Beth's body). At least Beth didn't die a walker.
That Gabriel's an idiot. I mean, what was he thinking when he left the church and ended up leading all the walkers there? Part of me was almost wishing Michone and Carl would keep the doors locked and leave him to his fate (it would have been poetic justice in a way, considering that's what Gabriel did).
I am actually surprised that Carl didn't do that, as he's done a lot worse in his time, and by breaking the doors open and letting Gabriel in he put his sister Judith in grave danger.