"Hey, Simon! What are you doing in there, jacking off?" His brother laughed. The buff 17 year-old liked to make fun of Simon's scrawny size, even though he had been almost as skinny when he was 13. Not that Mike was mean or anything, but he seemed to have forgotten what is was like to be small and weak.
Simon grinned suddenly and turned to the computer. It was time for a reminder. And if he did this right, he could save himself questions later. "Come on in, Dude."
The door burst open and a shocked Mike gaped at him. "Who the fuck are you? And where is my little brother? If you've hurt him, I'll kill you!" Even though he was now smaller than Simon, Mike balled up his fists and looked ready to attack.
Luckily, the program picked up Mike a lot faster, and it only took a couple of clicks of the mouse to start Simon's plan into motion. "Don't worry. He's fine. In fact, you can see him right now." Simon pointed to the open bathroom door.
Mike edged to the opening, watching Simon carefully. He wasn't aware of the years slowly melting away, or the subtle shift of his facial features. WHen he got to the door, he looked in and exclamed "Simon! Are you...?" But his voice trailed off, because her realized that the image of his little brother was actually his own reflection in the bathroom mirror!
"Shit!" Jerking back, he looked down at himself. "What happened to me!? I look like..."
"Me." Finished Simon. "You are me now, Mike. 13 years old, weak and skinny. And if you try to tell anyone else, they'll think you're, or I'm, crazy. How do YOU like being the little brother?"
"No! This is impossible!" Mike's eyes widened in fear. "You can't do this to me! I'll make them beleive me!"
Simon sighed. "That's too bad. I don't want to get everybody all upset. But I can fix things." He turned back to the computer and punched in some new options while Mike stared back down at himself in disbelief.