My wife always watches this show and usually puts up with the violence for the sake of the story lines. Not last night. Having slept on it, so some (just a very little) of the shock has begun to wear off, I think from the previews you can see where they might be going next. Carol didn't witness the event (or so I'm assuming - she's more Ninja like every show) and is still sane. Stick man, the black dude whose name escapes me is still viable. And Michone is shown firing an automatic weapon. The only real bummer is that I think we are going to see a lot less of Daryl this season. I hope I'm wrong on the last point.
Though I was obviously wrong about my choice, I thought it was a great episode. I liked how the writers used Daryl as the catalyst for Glenn being killed and the bulging eye special effect was pretty cool. My interest in the show had been waning. Now, I am very much interested in this season.