It all started innocently enough.
You had been paired with Jordan since the beginning of the semester as his lab partner, and through the first two months he had barely said more than two words to you, outside of whatever was necessary to complete each week's lab experiment. It was a shame too, because he was kinda cute, in a mysterious, quiet sort of way. 
However, one day as the two of you were working on an experiment, you accidentally mixed two different chemicals that suddenly started to fizz over the edge of the beaker. You panicked, reaching out to grab it to throw it into the sink, but the beaker immediately burned your hand, causing you to involuntarily throw it… right against Jordan. Luckily, after a trip to the emergency wash station, Jordan seemed to have no lasting damage… or so you thought.
The next day of school, though, you noticed that Jordan looked a little different. You weren't quite sure what it was, but you could swear the clothes on him were… slightly tighter, for some reason. The day after that confirmed it, as Jordan had significantly grown by then, and was now not one of the shortest boys in the class but the tallest, his shirt leaving his midriff exposed and his pants only coming halfway down his thigh. Jordan definitely looked uncomfortable in this situation, but still seemed to be rather quiet, not saying much about it, although it was clearly obvious and became the talk of the school.
That was a Friday. When Monday rolled around, Jordan didn't show up at school. You instantly started to feel guilty, wondering if somehow, being bathed with chemicals like that had done something to affect him. That guilt lasted up until you got out of school, for as soon as you left the school ground, you saw something that shocked you to the core.