Please don't flame for this. Oh damnit, why should you flame it at all? No one likes Pansy.
It was Pansy's turn to step in front of Boggart, and beat him. As she stepped on the light, pushing Goyle away, who was so scared, that he couldn't even move or react, it was her turn. Goyle's Boggart turned out to be a pair of clean underwear. Goyle, from when he was small, he was really afraid of changing his underwear, so he was always wearing the same one. That was okay with his boyfriend Crabbe, who didn't change his underwear, either.
So as Boggart took its shape to scare Pansy, she screamed loudly, and run away. From the classroom, everyone could hear her annoying voice.
-"Seesh, it was justa mirror" – Draco sighed ironically.