One of a kind. You've probably already been told something like that before. That there's no one else in the world like you, that you're unique. And until that fateful day, it was true. "I'll take a major step with this project and I don't care what you do, but don't you dare to trespass that line" She pointed to the yellow tape line on the floor that separated the two, "Got it?" She asked and the boy nodded still looking at his book, "Good, because I'm the only one allowed to go close to that thing... And I may have to go through my calculations again. The boundary line may not be far enough to avoid the possible flash that'll happen after I activate it" Stephan looked up from his book to stare at his friend with widened eyes and asked with a high pitched voice, "What?!" "Looks like you're gonna have a slight headache, but you'll be fine. Nothing to worry about. Fifteen minutes until I start up the machine... I'm sure it will be enough time to check these calculations and make sure you're far enough from the blast" "I would hope you checked that and ensured it before you started the countdown..." The boy mumbled in worry. Mary waved her hand dismissively as she stepped away from the machine, "Eh, eh, relax. You'll be just fine, it's probably not even gonna be that bad" But something did go wrong. And now only one must stick around.