The reason was they set their alarm, they were terribly conscientious about setting their alarm clock so they'd wake up in the morning to go to the exam, and er it was a very loud alarm clock so not the kind of thing you could sleep through, but come the morning of the exam the alarm went off and the student started to dream that they were out hearing church bells or something, you know they're walking around hearing all these church bells, thinking isn't it nice, you know, it's Sunday morning, oh I could go on sleeping.