Rainbow Dash has a freak accident while performing a Sonic Rainboom, and awakens to find herself in a strange new world, with strange new abilities.

Avengers and My Little Pony crossover.

Image Credit goes to Alienfirst : Link

Have you ever wanted to just stop? Have you ever been so insulted, and so broken you felt that throwing yourself into an oblivion was your only escape? Just know that even when you've thrown yourself off that ledge, hope is always close by. Even if you feel like it's a fictional thing, it's not.