I thought this was about shipping at first.

This seems more like the animators getting a bit carried away, than an actual error.

Just another windy day.

Cannot unsee.

“Well, spin my hat around, do you think she’ll be alright?”

New headcanon:  
Applejack’s hat is a living thing that can transform into almost everything. Like Ditto from Pokémon.

Calm down. There’s no need to flip your lid.

Rarity’s mind: Just smile and wave, R, smile and wave

It’s alive!

It’s funny how Twilight turns away when AJ turns to face her…

I love Applejack’s worried reaction after it moved.
 
AJ: “Twi..did ya use that ‘come to life spell’ again?”  
Twilight: “No…why are you asking?”  
AJ: “Ah think mah hat found a mind of its own”  
Twilight: “Your head found a mind of its own…well that sounds logical I think?”  
AJ: “No Twi, my hat, MY HAT!!”

Her hat can pick up on emotions, much like a pet. When A.J.’s worried, her hat feels it.

Leekspin meets hatspin.