You whicker happily as you see the results of your changes - the blond, muscular youth is a perfect match for the magnificent Clydesdale stallion body that sweeps down from his waist. His eyes are wide and dazed as he clutches at your mane - he hasn't yet realized that he isn't the same below any more.
He slides off, still dazed and stands there a moment as his immense black cock slowly retreats into its sheath. After a minute, he shakes his head and stares at you in awe. "That was..." Then he frowns, probably confused because he is seeing you from so high up. He looks down, expecting to the see the box, and gasps when he sees two massive Clydesdale forelegs and hooves. "OH SHIT!"
He twists around and gapes at his huge stallion's body, shaking each hind leg and pulling at the shaggy horsehide to make sure it is real. Although you think he is beautiful, he obviously has a different opinion. "No! This can't be real! I'm a freak! Shit! What will I do?" He starts to cry. "Shit, no! This can't be real! I don't want to be a freak!"