The end of Episode 4 broke my heart, but I think without that scene, I probably wouldn't have acted the way I did in Episode 5. People were crying over Vernon and co screwing them over and I kept saying, "Fuck them. I don't have time for this bullshit anymore," and when Christa asked about the arm, I chose, "It happened. Get over it."
I was done being the mediator of the group. I'm pretty sure I would still be the cautious type if I hadn't got the bite.
That said, I was welling up in the final scene. When Lee said, "Oh, I can't imagine, Sweetpea..." that was it for me.