He quickly realizes making fun of Demi was a REALLY bad idea, the moment he made eye contact on the card, he felt his body shrinking on a huge scale and himself being robbed of both his humanity and his manhood as he's turned into a Pixie girl.
"How now sprit? Wither wander you?" Demi says, quoting a Midsummer night's dream
"you have five seconds to shut up."
"Okay then, you're next Scott, maybe now I'll get a sister!" Demi says as she laughs at his upcoming test of fate.