A/N: The challenge was to write a 100-word drabble in which someone is Sorted into a different House. I took the pensieve sequence from Snape's Worst Memory, remixed it slightly, and put a Slytherin spin on it.
Disclaimer: Harry Potter, Lily Evans/Potter, James Potter, and all their associates are characters belonging to J.K. Rowling. I claim no rights to them, their surroundings, or their situations. Much to my sorrow.
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"Leave him alone! What's he done to you?"
"Well, it's more the fact that he exists, if you know what I mean..."
"What a lot of tripe! Pendeo Inversus."
James found himself suspended upside down, next to his erstwhile victim.
Snape spat out a mouthful of soap bubbles. "So lovely you could join me, Potter!" he snarled.
"All right, Severus?" Lily called.
"About sodding time you showed up, Evans!... Help a fellow down?"
"Certainly. Finite Incantatum."
Snape tumbled down with a yelp. "Lily!"
"Sorry! Couldn't resist," she giggled.
James watched, fuming, as they strolled away.
..."Sirius?"
(Snickers.)
"Get me down!"