I don't own bananas, but I do have partial claim to the thoughts implanted into my brain via Wrackspurts.
When life gives you lemons… slice them up and throw them in the face of life, because honestly that is literally the worst gift ever. And that's exactly what Luna Lovegood did.
Now, imagine you're just walking through the Department of Mysteries doing your job as an unspeakable for the ministry, having fun weirding people out with your odd words. When suddenly, you get sucked through a dang portal, and then you get tossed out like a pile of rubbish in a dreary old city in another dimension. So imagine how frustrated Luna was with this situation, and being someplace completely foreign to her world.
She was so frustrated that she kicked a rock. The stupid, painful rock bounced through the air and cracked into the skull of a man passing by, knocking him flat on his face on the ground with a loud thunk.
Luna thought about just whistling and walking away quickly, but then the man hopped up as if nothing had ever happened and tipped his hat in her direction. Luna just stared. The strange, smiling man calmly walked toward Luna happily, like she hadn't just almost smashed his skull in.
"Why, hello there, miss. People call me the Joker. Would you like to get a cup of tea?"