Background Pony #6308
I noticed that Dash never acknowledged Fluttershy’s accusation that she never let them play any of her songs, but I feel like this is a sweet, subtle apology for leaving her out like that.
RD: Keep it down with your yay’s, Fluttershy, or you’ll become as uncontrollable as Pinkie.
FS: (gasps) YAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAYY!
PP: (grinning maliciously) Good, good! Let the happiness flow within you. Feel its force, embrace the unlimited power of laughter! *Unlimited power!!! Hahahahahaha!