COZY GLOW: I've torn you and your friendship apart once before.

TWILIGHT: What are you talking about?

COZY GLOW: Who do you think framed the Cutie Mark Crusaders for my failed test and made you ban them from your school?

(Cozy's cruel confession echoed through Twilight's mind and her eyes widen in horror as she found out the truth in "Marks For Effort")

TWILIGHT: (gasps in horror) You mean…it was all YOU?! You purposely failed your test and let Apple Bloom, Sweetie Belle and Scootaloo took the fall for it?!