I think the game of "dumb charades" was invented just to help people copy in exams. Imagine, It's just the perfect way to help a friend of yours. If you talk or whisper, you could be heard. If you pass chits, again the same. But signals. Who can spot that? You aren't making any noise and you do not have any incriminating evidence on your self. It's just perfect! All you have to do is pick the right moment (when the "invigilator" is walking with their back to you. When they are talking to some pretty girl, you know, whichever works). Only yesterday, in my exam, I had to tell a friend of mine the name of a theory. It was called "The magic Bullet Theory" (no, seriously, check this out http://en.wikipedia.org/wiki/Hypodermic_needle_model ). So I tried mouthing it out, but wasn't working. And then I realised. Dumb Charades! Eureka!! So I did an action which looked like a magician pulling a rabbit from a hat. He guessed, rightly, tha...