Denial

                     Twilight woke up. Only she wasn't in an asylum anymore. She was on a round floating platform, with a six-pointed star in the middle. The sky was red and black, appearing to pulse. Twilight seemed to be alone.

                    "Hello?" she shouted. But the only response was an echo for a little bit, but then, a slightly distorted version of her own voice said,

              "I'm right here."  And, who seemed to walk out of the sky, was herself, but her dark purple hair was derpy yellow instead, and her bright pink strand of hair was now bright green, and the violet strand was now a darker green, but not dark green, and her pelt was as green as grass. Her teeth and eyes were black as night. Basically, the pony was just an inverted version of herself.

                  "Who are you?" Twilight Sparkle asked.

               "Oh, don't you know, Twilight? I'm your consciousness, your darker side, and your insanity." the other pony said. "I am Midnight Dimmen."   Twilight backed away.

                  "W-what are you here for? Where am I?" Twilight stammered.

             "You are in a coma, and have been placed in the dark recesses of your brain. I'm here to show you the real reason you are in the asylum, the real reason you killed Celestia. It's not stress. It's your hard and tragic life that's snapped you." Midnight Dimmen explained. "We must explore your memories, or you will die." A portal opened up. "Shall you go, Twilight?" Twilight stepped forward.

                "Yes, yes I shall!" she announced.  And they both walked into the portal.

She'll give in instantly, thought the negative-colored pony. I can already imagine the faces of her friends as their dreams and friend fade away...