Why so many people have a dream in which they are just about to take a mandatory school exam and they're totally unprepared, or they've missed it because show up in the wrong day, or the exam is on the very next morning, etc.; and get extremely nervous and anxious, up to the point of waking up panting and taking several minutes to figure out it was all just a dream?
Or maybe they're only being whipped... that's so reassuring!
Is there a technical term denoting this kind of dreams? What's their nature? Is it specific to the Western world/culture? Are there other examples of it?