Alcohol wouldn't throw my viewing reactions off the charts though, but being on camera might also be part of it. It wouldn't be much fun to see reaction to people staring at a screen.
Those people sure were intense about an ice wall going down as if they weren't going to expect that. ;p
I do get invested in characters but not in a way I audibly gasp and fall of my chair when something happens to them, maybe it's a show thing though since you don't get to know them as well as in books, my reaction is mostly disbelief and re-read certain parts thinking I've read it wrong. Getting excited or emotion is one thing but this lady cares too much about a wall haha.