Imagine Teddy getting a Howler from Tonks and he starts to freak out, but he opens it and it's like:

TEDDY GUESS WHAT, THE WEIRD SISTERS ARE COMING TO TOWN! PACK YOUR THINGS, SON, I ALREADY TALKED TO MCGONAGALL AND SHE SAID IT'S COOL. MERLIN'S PANTS I'M SO EXCITED! DON'T TELL ANYONE OK, MAYBE YOU SHOULDN'T TELL YOUR DAD EITHER. OH SHIT, IS THIS A HOWLER? I FUCKED UP, I FUCKED UP!

And Remus just at the teachers table hiding his laughter