OK, so in June, screenwriter Katie Dippold tweeted a tbt about when she accidentally showed up to a party dressed like the Babadook. The tweet's been retweeted over 70,000 times. It's pretty much the best thing ever.
The Babadook, just refresh your memory, is the horrifying monster from the movie with the same name released in 2014. He wears a big top hat and looks sort of like a ghoul-looking thing.