Hogwarts had decided to let 3rd year, your year, and 5th year, Fred's year, go out to a wrestling gig, well, it was all a staged act.. You were put next to feed, your enemy that loved to get you flustered, and when the actors where pinning each other down he kept laughing and it was driving you nuts. He soon figured out you were getting annoyed and so he said,

"Aww... What's wrong? Is someone unhappy that they have to sit next to me?.. Loser..."