Pronyma was good at only a handful of things. Jinx's and everything having to do with Herbology and Potion making was her handful skillset. She knew for days in advance that today was Alchemy day, so last night she prepared, sneaking around to get the ingredients that they used in the Puking Pasties. not that she could make the pasties herself, but she sure knew how to make what serum used in them to get one to puke. She carried her vial with her to class, and as she weaved about in the halls, she held the vial in the palm of her hand, hidden by her House robe. As she walked to class, when she thought no one was looking at her, she would sneak a drink, drinking it all until all the pink, fuzzy and good tasting liquid was gone.
As she got to the second floor, she dropped the glass vial down to the first, not caring that it was glass, heavy and could possibly hit someone on the way down, no. Pronyma wanted to hide the evidence of her illicit substance. She arrived at the door and walked in. She could feel her tummy rumble and knew it was working. This was not a class she looked forward to attending. "Greetings Professor." She gave a grimace and her scratchy voice came out in a groan. "Sorry, I'm not feeling well today, I don't think I'll be able to attend." As she said that she groaned even louder. Just what Hogwarts needed, another overly dramatic Slytherin. "But I want the grade. I'll give it a go." She walked to sit down in her chair, but she had a mishap with her potion. Instead of it being just a puking pasty mix, she somehow, unknowingly to her, changed the formula, instead of just sick, Pronyma was sick AND partially invisible. She faded in and out, her feet appearing to be the only remains of her, and when she returned she was back robes and all.
While Pronyma was unaware of her accidental invisibility, she thought the sickness would be enough to have her excused, or at least sent to the nearest healer.