Time Lords and Terror/Funny

""I've heard about regenerations going wrong before, but never one that ended in...pony!""
 * When The Doctor *ahem* 're-modulates his vocal chords' with Fluttershy to activate the Hervoken Charm Cube. Try to imagine David Tennant speaking in Andrea Libman's 'Fluttershy' voice without laughing.
 * Pinkie Pie's ability to dumbfound the Doctor is both hilariously in-character and believable.
 * The Doctor's reaction to his ponification

"Rarity: It's so... tacky! The Doctor: What?!"
 * Rarity's reaction to the TARDIS.

"Twilight: Why did I even get this app?"
 * Twilight's computer is programmed to show a virtual Pinkie Pie whenever it comes up with something that doesn't make sense. Think about that.