The least plot-significant moment to make the list still deserves an honourable mention. Lysa and Robin Arryn's introduction to the show was rather disturbing, and shocking in a 'what the hell am I watching?' kind of way. Robin is a sickly child, Lysa is a psychotic, over-protective, sheltering mother who is still keen to breastfeed her son, despite him being close to age 10 in the show. Again, it's not blood, guts, or anything massively sinister, but it was still shocking to see something so bizarre on our screens. He could at least be on a bottle by now...