Twilight orders Unimpressive to teach Pinkie Pie how to fight bladecasters. At first he thinks she's trying to teach her how to bladecast, leading to the following snark:
“Sure thing,” [Unimpressive
] drawled. He turned to Pinkie. “First, you take your unicorn magic—oh wait.” He threw his forelegs into the air. “I guess that’s that. Come back when you’ve grown a horn.”
Unimpressive: But she's loonier than a fruitcake!
Pinkie Pie: There are no loonies in fruitcakes, silly. Only money cakes.
Unimpressive: You see this? I'm not letting her come at me with sharpened steel.
Twilight: I order you as your master and commander.
Unimpressive: And what if I refuse?
Twilight: I'll tell my mom.
Unimpressive: Well played, General.