SPD. Two students disrupt a Friday morning Chemistry class at New Tech University.
"The various orbital groups you'll want to keep in mind are S, P, D, and F. Pay particular attention to S, P, D-"
A sudden uproar of laughter erupted from the front left of the room, and a hundred students, along with one instructor, turned to look. Two boys, almost too young to be in college, were sitting at their desks, laughing loudly. One, a heavy boy with unkempt blondish hair and clad in a gray uniform, was giggling madly. The other, a darker-haired young man wearing black gloves and a green t-shirt, offered an obnoxious "ha ha ha! Ha ha ha ha!"
The professor murmured a few swears and the words "dual enrollment" before continuing with his lecture.