Discord being the ‘passionate’ and ‘caring’ being that he is gives a human that had nothing a chance at being reborn. Though the human didn’t read the fine print and his life force was thrust into the womb of Rainbow Dash, acting as her punishment for imprisoning Discord in stone.
Now as a foal, will the human be able to learn the Equestrian language he is so unfamiliar with? Will he find a way to speak to the ponies about his being from another dimension without freaking them out? Or will he accept this new world and live out the rest of his life as a pony?
(gore tag...reason? Childbirth. Nuff said)