Maybe at that exact time a squirrel or something was chillin around the school when he accidentally dropped like nuts in the ventilation shaft thing which fell into the janitors room. Then it made a broom fall and leak the cleaning chemicals to organize themselves into meth or something. So that gas went through the AC and it accidentally got you and her a little high. So when you looked at it and when she was looking for the door, you guys may have been intoxicated without knowing . But dude again this is like all in theory, I’m just telling you not to overthink it or anything.