After watching the finale, Fluttershy is officially the scariest/creepiest pony on the show. I don't understand all the "omg I wish I could find a girlfriend like Fluttershy ^_^" comments on YouTube. She clearly endured some significant trauma as a child which has resulted in extreme need for friends either to control or be controlled by.
Love the Fluttershy - else she gonna fuck you up good.
I guess it's a classic freakout response to something that's entirely unexpected. You go your whole life doing well with animals, but suddenly you meet a group of them that respond in a completely unusual way. So your brain hits a STOP 0x0P0N135F4 error, and you go
insane.
I bet she's the kind of person that would stab you to death in your sleep if she suspected you of unfaithfulness.
In that case, I think it would probably more of an Annie Wilkes (
Misery) thing. She'd kindly nurse you back to health, then arrange it so that you trip over a footstool and fall onto broken glass that's been coated with mercury. "Oh my goodness, just look at you! It's back to bed for you, mister!" Then as you experience the effects of heavy metal poisoning, you spend your days silently begging for Nightmare Moon to return, and bring eternal night, in the hopes of ending the most endearing suffering you've ever known.
(So the MLP writing staff has done their own take on various old stories and themes...I think they could get one or two good episodes out of the Misery theme.

)