This is based on my own experience during my college days. Here it goes.
An examination was conducted by our very strict and monsterous professor, everyone are very anxious about how difficult the exam is. Now, when the examination is past 20 mins, everyone has this "don't know what to do" face.
As a typical college student, we have witnessed a lot of crazy things done by our mates. Cheating has become a survival tool and is only possible unless your professor is not guarding you all.
However, our professor stayed alert and observing everyone to avoid cheating. Because when he saw someone just even looking to a seatmate, he would automatically crumple your paper and automatically mark you as failed in the course.
I had this mate who wasn't able to study the coverage. What she did was so crazy. She acted as if she passed out and fell on her chair.
Our professor panicked and immediately rushed her to the clinic. With that, she was given a special exam by the next day. And the good news was she did pass the course because she already knew what topic come out on that exam.
If ever you are not able to study and badly want to pass the course, here's a tip. You must still show up in the examination date acting like you're ready and think of an act that is not mainstream to excuse yourself.
However, I do not recommend this for those who doesn't have a bit of acting talent, like me. Hahahahahaha!