My friend's 1 year old watched walking dead, and now she is worried her baby will have nightmares about the episode. I said she is probably to young to understand what the episodes means, and wouldn't know to be afraid of zombies, axes or blood and stuff? Can be babies be afraid of this stuff without any prior bad/scary experiences to compare it with? By 1 year old, are they mentally developed enough to see something on tv, and relate it something they were terrified with in real life?