Severus couldn't sleep. It was another one of those restless nights when he could tell—he could sense that that brat Potter was up to something. So he decided to get up and prowl. On a good night, he could prowl with the best of them; and he was anxious to foil some of Potter's plans tonight.
He rolled out of bed and put on a random pair of shoes—he couldn't really see what pair because it was dark, but it didn't really matter, as all his pairs of shoes were the same.
Severus strolled out of his rooms and breathed in the cool dungeon air. It was nice to be up and about while most of the students were asleep, and while there were other students out of bed just asking for detention. He went upstairs several floors, then turned a corner and walked into something very big.
He bounced off and hit the floor and landed right on his bum. Evidently he had walked into one of Peeves' pranks: one of the larger statues blocking off an entire corridor, but very hard to see, unless you squinted. Like an almost-invisible wall.
"Well that was embarrassing." Severus said out loud. He was about to curse the damned object out of his way when he heard a giggle from just behind him. Peeves was floating in midair, just from above him, cackling.
"What's that he's got on? Did the Professor lose all his othershoes?" Peeves sang from above.
"What the devil are you going on about, Peeves?" Severus growled from his spot on the floor.
"Looky what you've got on your feet, sir!" Peeves mocked, then zoomed away, already creating the lyrics for the song he would sing to the school tomorrow. This was too good to miss, even if it was a professor.
"What the--"
Severus looked down at his feet, glittering in the moonlight. Wait a minute…glittering?
"DAMN YOUUUUU, LUUUUCIUUUSSSS!!!!"
Several hundred miles away at Malfoy Manor, sipping wine in the lounge, Lucius Malfoy laughed into the night.