wen is this?

I don't know when this is. Does anybody have a guess?

This is when Harry asks Katie who gave her the necklace and she says she really can't remember. Then they turn around and Draco is there staring at them and looking scared because he was the one who caused Katie to touch it in the first place.

God, this is my favorite scene in the entire movie, Tom Felton portrays Draco so well. Plus he's a cuuutie