"Hmm, I feel like a bit of horse riding", Mary thought to herself and added in the Horse vial. She took the finished drink to Brett, who after a bit of coercion from Mary downed the drink, not understanding what was so special about it. "Um...ah...and now what?", Brett stammered. "Oh, you'll see in a moment", Mary smiled at him. His skin turned to rubber, already completely freaking him out when he rubbed the smooth, darkening surface. His rubber skin was quickly turning a deep brown, so he ran to the nearest mirror and saw that he was completely brown, except for a streak of white on his inflating face, which quickly expanded to multiple times its previous size. The brown rubber on his hands and feet melted and turned black within moments, hardening just as quickly into four solid black stumps. "Oops...there go your hands", Mary giggled in amusement. His ears had pinched completely upwards, sticking out of his head like two rubber spikes. The strangest sensation was his body mass increasing as he felt his chest and stomach inflate and stretch, forcing him into quadrupedal position in order to keep his balance. Finally, a small black dot above his butt quickly inflated to a dangling inflatable horse tail. "Whee, my very own little horse!" No longer able to contain her excitement, she leapt unto Brett's back who promptly gave a loud neigh in surprise. "Now walk, my steed!", she laughed. After a bit of experimental trotting, Mary wondered where she'd take Brett next...