Proctoring a Final Exam

I'm proctoring a final exam.  One student turned in his exam early and I've already graded it.  I want to grade the rest now, but I have to wait for them to finish.  I've brought work along but I don't feel like doing it.  I have to finish grading in 24 hours of the exam because of the need to turn senior grades in.  I want to get it done.  But I have to wait.