[The trolling unicorn's horn blinked twice. The second one teleported him far and away from Twilight before she could respond, while the first one placed a Dimension Ward which prevents Twilight from teleporting after him or even tracing the teleport]
Twilight Sparkle: "AAArgh! Outwitted by a TROLL! (Metaphorical one, that is)" [Smashes the boombox in anger] "I'll go with using lightning on his sorry flank if he ever comes back to troll me again!"
Spike: [trudging up the stairs and yawning] "Another prankster, Twi? Maybe you should stop ASKING them what spell you should zap them with. It's intimidating and all, but you're practically leaving the door open for these punks to get away."
Spike: "Heh, I'll be waiting to see that. [Yawns, rubs eyes.] One more thing: if you ever run into that punk again...instead of just lightning, why not go for everything you mentioned? Kinetic bolt to pinball knock him on his flank, Telekinetic slam to pinball him around, Lightning to zap him; finish it off with a shrinking spell, and keep him in a jar when you turn him over to the Royal Guard for breaking in?"