Rainbow Dash goes to get a glass of water for Pinkie Pie. Literally one second after disappearing into Twilight's kitchen, she does something to set off the smoke detector. And then a jackhammer. And then machine gun chatter, complete with muzzle flash. And finally, a barking dog.
Rainbow Dash (off-screen): Twilight, do you have any ketchup?
Celestia's last assignment and the "lesson" Twilight learned from it:
Spike: So, hey, you remember that letter she [Celestia] sent you where she asked you to get those pictures of Applejack's brother? Twilight: Yeah. Spike: And then she told you to write a critique of Mac's physical appearance? Twilight: Yeah Spike: And then she sent the critique to Mac? Twilight: (*levitates a drink into her hoof*) Yeah. Spike: What'd you tell her you learned from that? Twilight (in a monotone): A Phillips screwdriver is persuasive, but not seductive; and also Rarity charges out the butt for stuff I really think she should do as a friend.
Twilight and Rainbow Dash on the cloud from "Alicorn Day", when suddenly Twilight's wings disappear and she falls through the cloud.
Aurora on the bus:
Aurora: Excuse me, weird adult talking to a kid. I'm supposed to avoid Stranger Danger situations. For that I need a pretty wide bubble without any strangers in it. Now, are you gonna have a Stranger Danger situation? [*the adults move*] Thank you! I can tell by the lack of proximity to me that you are probably OK adults.
Rainbow Dash: What ridiculous Cthulhu nightmare did I just escape from?! Hey kids, everyone get ready for the Church Of Dagon Can Drive! Kids that donate 20 cans will get a Church Of Dagon pocket knife. It's got the Church Of Dagon logo on it and everything! Kids that donate 50 cans will get a signed photograph of Dagon himself. And, if the school reaches its goal of 40,000 cans, Dagon will visit the school, live, in person, and will suck out your soul through your nose!