Filly Pinkie has just come from her latest sensational party. Hyped up with energy she decides to go for a walk before going home, when she happens upon a scared pegasus huddled in a bush. She had fallen down from Cloudsdale earlier, as she had once before.
Pinkie Pie slowly gains Fluttershy's trust by being friendly and respecting her boundaries, and the two of them become fast friends. As Fluttershy falls asleep Pinkie keeps watch over her until her family can pick her up. Having never been too close to a pegasus, Pinkie gets a little TOO interested in the extra appendages.
All inspiration for this story comes directly from this comic: https://derpibooru.org/377?scope=scpedd0a897b87ab38133e505fc8d895b9d387bc2b8e