the sorting hat is placed on your head as you wait for the big decision..your Harry Potters child, so you expected to be put into Gryffindor immediately- the sorting hat was taking a while

Sorting Hat: hmm…this is tough, brave as if a Gryffindor. Resourceful as a Slytherin..but it’s clear now… SLYTHERIN!

Slytherin cheers, to have a Potter in their side? Perfection..but you are NOT pleased. And your dad will definitely not be happy when your in the enemy’s house