Just noticed this creepy detail:

The Grangers had hardly left with Madam Pomfrey before the Defense Professor had knocked upon the door to her office and then entered without waiting for her answer, and spoken before she could say a word.

Madam Pomfrey is in charge of the medical ward, so the Grangers are not going home, they are going to a hospital.

In magical Britain you're only allowed to remember what the government thinks you should remember, and remembering the existence of magic or that you have a son named Harry is a privilege, not a right.

Harry from the prior chapter to his parents who still have a living child to give them this warning.