@adatron  
It’s just as likely to be Cadance’s breast milk as it is formula. Considering that prepared formula needs to be used straight away and that they weren’t planing to be away for long, it’s in my view likely to be breast milk. But that’s what you get when you are around babies. Before long you are covered in vomit, pee, poo or all three at the same time!
 
I don’t need to imagine what Cadance and Shining Armour go through on a daily basis, as a father myself, I know what it’s like.

@Background Pony #EE75  
Twi was going insane. Needed a reality check

what was the point of this scene?

@Cheeses  
you expect to see ectoplasm on MLP?

@adatron
 
If I had not seen the episode, I would guess that it is ectoplasm.  
Imagine Flurry Heart unintentionally conjures up a spirit. Twillight shoots a laser beam to protect her.  
The beam hits the spirit and it explodes right on Twillights faces.

@Background Pony #F97B  
I should like to, though.

BOOM! HEADSHOT!

@Cheeses  

 
What if it isn’t baby formula?

@Officer Hot-Pants  
Don’t worry. You don’t have to.

@Background Pony #4323  
I don’t get it.

Yeah…

They have GOT to be doing some of these on purpose.

Oh no.

Go ahead, Lumineko. Draw it. You know you want to.

yea  

When I saw this, I was said to my wife, “Yup. This is totally going to be GIF’ed.”

@TheOtherPinkiePie  
Ah ok. :)

Oh god. This is going to be a thing.

This absolutely will not be abused nor edited in any way. Ever. No no, we don’t do that.

@Delta Brony  
Already been added.

Should I add “Out of Context” tag in there?

Yeah, I see where this is going