Takes place after "The Break Up Break Down"
Applejack is wondering if she's been a good influence on her quiet, withdrawn older brother or not. Rainbow Dash drops by to toss in her two bits as the two discuss how big an influence siblings are in shaping a pony's life, liberally punctuated by snark.
Note: I wrote this up shortly after the episode aired and promptly forgot about it. It's a pretty unpolished work, just a one-shot of two characters chatting, but I figured I might as well share it. If nothing else, hopefully the two trading barbs is good for a few chuckles.