when scootaloo was eight years old, she had a huge accident that changed her life forever. Her freinds heard about it, but they never heard the full extent of the damage. Scootaloo has lived her life without telling anyone about what happened, until an unfortunate event revealed her secret for all to see.

I might take out the idea of an OC here, let me know in the comments if you think it is a good idea or not.
I found this picture on the web the other day and was inspired by it