Harry Potter was sitting by the fireplace and gloomily thinking, "I should invite someone, after all. Maybe Ginny? Or Luna?"
"This damn ball," he mumbled. At that moment, Seamus and Dean, who were having a pillow fight, bumped into Harry, knocked over the dish of floo powder and pushed Harry into the fireplace.
Harry was spun around in the Floo network and spit out onto the floor in a very fancy foyer. Lit candles stood around the room, a well-dressed young man missing a leg and with a rope around his neck was going up the staircase in front of Harry, and on the upper stair landing, some skinny old man was kissing the knee of a completely naked woman. Harry goggled. But before he could even open his mouth, an impossibly large black cat sidled up to him on the right and meowed:
"Oh, how unexpected! Come up the staircase, young man. You must pay your respects to the Queen!"
The cat took him by the elbow and started dragging him upstairs. Harry started getting a headache and rubbed at his scar, as was his habit.
"Oh my, I see you're having the same problems as Messire," the cat nattered on, as he kept dragging Harry upstairs. "I'll give you an ointment, young man. It helps for knee pain remarkably well, and I'm certain it'll work for you too. Well, come on, don't be timid! We'll find you a dance partner, you'll learn to dance, too, while you're here."
"True enough," thought Harry and briskly headed up the stairs.