While the coachman is speaking to you, the hot-dog seller is packing up and looking for more victims.
As he lifts the cases of bottles he notices something. The bottles of Griffinaide, which are meant to turn the victim into an anthropomorphic griffin, are filled with a blue liquid, but the liquid in the bottle he sold to you had a yellow liquid.
"Of course!" He thinks "I must have mis-labeled a bottle of Jackass Juice! I better give the customer what he payed for." And with this, he clicked his fingers.
And with this, your body starts to spasm as fresh gas bubbles from within you, causing to burp a sequence of very strange 'HAW!'s. And with this, every burp induces new changes.