"Oh hey, TwiAAAAAAAA--" Rainbow Dash screeched as Twilight walked through the wall of her secret Twilight Sparkle shrine. "T-Twi, what are you doing here?"
Twilight made a face, looking over her shoulder. "Wait, where am I? I swear I was walking down the hall just then! And why--"
But Rainbow Dash was gone, for she had fazed through the floor in panic. Nopony ever saw her again.