As every student knows, the biggest rule of cheating is: don't get caught. And teachers and exam proctors are experts at catching students in the act. Which is why many students go above and beyond, enacting clever and elaborate cheating plans that they hope they'll get away with. If these students put as much energy into studying for their exams as they do cheating on them, they wouldn't have to cheat in the first place. But where's the fun in that?!
Someone asked exam proctors of Reddit: "what is the most elaborate attempt at cheating that you've witnessed?"
Not an exam proctor, but a student who heard of this afterwards. It was two girls, and the one who knew the answers sat behind the other. During the test, she started braiding the other girl's hair. When the teacher wasn't looking, the one in the front would make a number with her fingers on the side of her thigh (the question), and the other responded by pulling her hair on specific spots (A, B, C, D).