Given a classroom of 28 students, 2 hours, and an essay exam, one person will finish in under 30 minutes, over 90% will finish within 90 minutes, and 2 will drag out their misery and mine, right up until I call for the papers, whereupon one will sigh and turn it in, and the other will disregard me and keep writing. I like that one. I pick up my things and leave. Without the exam.