Which student, sitting in a boring class, has not dreamed of a blanket and a pillow? The soft voice of the professor echoes through the classroom, student’s hand draws jagged lines in his notes, his eyelids grow heavy, his head sinks… And then, waking up, the student realizes that the lecturer is talking about something else. “Was I asleep? Was I really asleep? No one noticed?”, the student thinks, blinking confusedly, and picks up his pen again. And his eyelids become heavy… In another word: torture. Read further to know why it happens and how to cope with it.