YMMV / Falling Backwards

• Designated Villain: Both the doctors and Celestia are only looking out for Rainbow's safety when they recommend she be put in a mental institute.
• Moral Event Horizon: Gilda crosses it in Flying Forwards, when she kidnaps Rainbow Dash over their fallout in Griffon to Brush Off. Despite knowing about Rainbow's brain damage and subsequent age regression, leaving her for all intensive purposes, an innocent filly, who is both incapable of fighting back or even knowing what she is being attacked for. Also, it’s revealed that she is trying to start an uprising in Griffin Stone.
  • Typhon probably crossed it as well. When he blasted Chrysailis with a de-aging spell, before leaving her in the Everfree to be eaten by timberwolves.
• The Woobie: Rainbow Dash suffers a devastating crash, that both leaves her horribly injured and causes permanent brain damage, leaving her with the mental capacity of a preschooler and no guarantee of recover. If that wasn't enough, she now faces being sent to a mental hospital in Canterlot, where if not for Twilight's intervention, she would probably have been medicated and left in isolation for the rest of her life. This ultimately leads to her being physically regressed, as the sole way to allow her to recover.
  • The Alternate sequel subverts this last Throw the Dog a Bone, by having her get her memories back after being irreversibly de-aged.