"Siri, please stay away from curtains," the tiny teen made him promise as he gave him a tight hug good bye.
"I swear it, pup."
Sirius shot up in bed. "Curtains, why curtains?" he glanced around. Letting out a manly shriek of fear, he began to rip the curtains down around his bed. "Curtains, they are everywhere!"
He dashed around the boy's dorm tearing the curtains down from all of the beds, waking up all his roommates.
"Padfoot!" James shouted.
He skid to a stop in his run toward the windows and turned to his best friend. "Yes, Prongs?"
"What are you doing?"
"I'm taking down the curtains."
"I see this. Why are you doing that?" he asked as if speaking to a 5-year old.
"In my dream your son told me to."
"He's officially lost his mind," Remus muttered sleepily pulling the blankets up over his head.
"Right, Sirius, are you sure that Bludger didn't hit you harder than you thought?"
"I'm fine! I just need to lose these dang curtains." He resumed tearing the curtains down around the windows of the room, letting in the bright morning light. "Does anyone know where we can get any blinds?"
James threw his pillow at his friend and rolled out of bed as he groaned. "Whatever, Padfoot. I'm going to shower."
The rest of the day continued in much the same manner. Sirius tearing down all curtains he saw, earning detentions from Filch and McGonagall, both of whom caught him in the act of tearing them down. Whenever asked, he just insisted, "Prongs's son from the future told me to."
He was checked out by both Madame Pomfrey and a Mind Healer from St. Mungo's and was pronounced sane, or at least as sane as a Black could be. So, the school got used to the lack of curtains around the Gryffindor dorms and in the classrooms for the remaining months of the school year.
Finally, it was time for them to return home. After teary farewells and a long train ride to London, James and Sirius Apparated to their new flat. "Go on in, Pads," James said, fighting a smirk.
"Don't mind if I do," he entered the living room and shrieked. "Curtians! Prongs, why are there so many curtains!" he cried falling to his knees.
James levitated him to his bedroom. "Here you, Padfoot, this should be better."
"No, NO, I refuse to look. The curtains are taking over the world! No more curtains!"
"Pads, open your eyes."
Hesitantly he opened his eyes and cheered, jumping up. Around all the walls and around his bed were blinds of all kinds. Plastic blinds, metal binds, wooden blinds. Horizontal, Vertical, fabric (but structured), and all sorts of blinds they had ever seen. "Blinds, blinds, how I love you, blinds!"
James laughed and pulled out the camera. Sirius dancing around his room in only his jeans, his hair pranked a hot pink, worshiping the blinds was sure to be good blackmail material in the future.