Pinkie Pie couldn't believe it. Her best friend had betrayed her! She couldn't let this slide. She knew that there was only one place for Dashie to hide: Cloudsdale. She would plot her revenge on her former friend, and get Dashie back for what she'd done.
Rainbow Dash sulked. She had hurt Pinkie, and now Pinkie would never forgive her. The last time Pinkie did this, it was a genuine misunderstanding, but this time, it really was Dash's fault. There was no way Dash could apologize without being ripped to shreds by Pinkie. So she hid, knowing that Pinkie, an earth pony, couldn't visit Cloudsdale. Dash knew she would never see Pinkie again.
Meanwhile in Ponyville, Pinkie was screaming at Twilight, demanding that she cast the spell so Pinkie could walk on clouds. Twilight, however, knew better. She knew from the sight of Pinkie's hair that something was wrong. The fact that Pinkie was talking like a deranged maniac confirmed this. So she refused to cast the spell. But Pinkie knew Twilight well, and she knew exactly how to get her to crack. "If you don't cast the spell, then I'll burn ALL of your books!" She held up a box of matches and waved it in Twilight's face. "You wouldn't!" Twilight responded. "Oh, but I WOULD!" Pinkie said, as she grabbed a random book off the shelf and set it ablaze. Twilight panicked. She had no idea why Pinkie wanted to go to Cloudsdale and didn't know if Pinkie wanted to hurt somepony, but she didn't want to lose her entire library! So when Pinkie reached out to grab another book, Twilight shouted, "FINE! I'll do it!" A glow emitted from her horn and flowed into Pinkie. Pinkie suddenly felt lighter. She was still just as insane, however, and threw a match into the row of books, setting it ablaze.
Pinkie Pie confronted Rainbow Dash. This was it. "You're not my friend anymore!", Pinkie shouted." Dash replied, "Pinkie, I'm sorry!" But Pinkie wouldn't have it. She charged at Dash, and....