When Wesley Quill of the Celestial Guard resigned from his position as an engineer, immediately after the changeling invasion, Princess Luna said something that inspired him, and comes back to bite her in the flank every once in a while.

She said "There is an ancient phrase, one that I find ironic. Shoot for the moon, and even if you miss, you will land among the stars."

Now this Earth pony is the leader of those who wish to shoot for the moon, and, much to Rainbow Dash's displeasure, has broken the sound barrier with a pony made device... which hit Luna's home on the moon with enough force to wake her up...