"Ow!" you cry as something stings you. You expected it to be a wasp or hornet but when you feel you discover a poison dart.
You start feeling giddy and then your clothes start to feel tight. This is because you're swelling up. You grow to a height of 9 feet and a weight of 700 pounds. As your clothes rip off you find your skin has turned grey and thicker. Your shoes rip apart due to your huge broad flat feet. Your fingers turn to fumbling fat digits but to make up for it your nose and top lip enongates into a prehensile trunk, while two of your canines grow into short tusks. Finally your ears grow to huge flaps.
You examine your body and find that you have become a huge anthro-elephant!