Robo: You just stabbed her in the eye.  
She’ll kill you.

 
Sure

Freak the buck out. Then some intellectual discussion.

@Blackie  
So, do you just emulate SPN and Avengers moments IRL?

Ask her to serenade me with an epic rock ballad in the ROYAL CANTERLOT VOICE.

And if she’s not a changeling, then she would obviously have survived. And then I would slowly pull out the butcher’s knife out of her eye and say “Sorry. I’m paranoid.”

Get ready for some Alicorn lovin’. ;3

Put some pants on before bowing politely.  
And then have a delicious conversation filled with gifs and cuss words, because that’s how I talk IRL.

boop her nose

Robo: Fuck you, changelings are great.
 
I would ask what she’s doing in a bookcase.

say hello

“AAAAAAAAAAAAAH! AAAAAAAAAAAAAAAH! AAAAAAAAAAAAAH! AAAAAAAAAAAAAH! Oh Hi Luna. AAAAAAAAAAAAAAAAAH! AAAAAAAAAAAAAAH!”

Ehhh…Wanna see what is internet?

Kill her because she’s obviously a changeling.

She’s about to rape me, AAAAAAHHHHHHH!

Calmly state “Don’t you ever knock?”

I’d say, “Wait a sec, aren’t you a fictional character in a show that I watch?”

I would hug her and ask her if we could spend some quality time together. I would love to talk to her about the night skies and about Equestrian history!

Hug

I would first quickly hug her, then ask how she got so short. (I’m sitting down)

Wonder how much I drank.