Subj, I am curious. And why would people do this? I have some students in my class who would start packing their stuff, books, laptop and clapping doors when leaving. And they do it 5 minutes before the actual time is called. I mean - c'mon. Are they in such a rush so that they need to distract everyone else to just save several minutes? Or do they do it on purpose?? Or to show off that "I am smarter, you are still writing your answers and I am done already" ?? I just hate it. And it is not being smart, the time is allocated for reason, and they end up missing issues. Usually those who use all the time given get better grades.