I enjoyed that episode.
Regarding Glen, The fact they did the slow motion of him falling seemingly with Nicholas on top of him and when someone was being ripped apart,It seemed to be above him, also his facial expressions made me think it was not him being torn apart......but then if you see when he lands on the ground initially, He seems to be on his own with nothing on top of him so they have clearly done it to create a talking point for a couple of weeks.
I also love Glen and kinda want him to survive, but it would be pretty silly considering the impossible situation he is in. I just find it hard to believe someone with his skills would find himself cornered like that but i guess he was stupid enough to follow Nicholas's lead.
I actually feared for Rick at one point, even if he is the focal point of the show. i guess its possible the actor might want to move on at some stage and we could have that big surprise. At least he has an RV to hang out in. He will be safe in there for a few days and he has a walkie talkie to let the others know what's happening to him. When they panned out, that building was shown for a reason so that will come into play I'm sure.