But I'm going to NOPE all the way to the bank if you tell me this great beast has two hearts. - Matty Malaprop
Perhaps the TARDIS is just trying to feel festive in anticipation of Cinco de Gallifreyo? - Matty Malaprop
Because "Horton Hears a Dalek Shouting 'Exterminate!'" just didn't roll off the tongue well enough.