Definition: This fallacy is not used as a means for persuasion, but it is more a lapse of logic. It is found mainly in a teaching setting whether it is in a school, a seminar, or a one on one relationship. The curse of knowledge is shown when an instructor - usually of high intellect - is communicating information under the assumption that the listener already has a strong grasp on the subject matter. In most cases it is unintentional because the speaker may not realize the gap in knowledge. There is difference between the curse of knowledge and boasting; someone may be speaking complexly in order to flaunt their intelligence and be fully aware of it. The main distinction is in their intentionality. A person under the curse of knowledge will not be aware of their audience because they are so used to conversing with people on their level.
Real World: In many classroom settings it is very easy for a highly educated instructor to enter a lecture unconsciously being in a mental state to teach higher level students. The teacher will most likely just skip the basics and graze over terms that are in need of explanation.
Film or Literature: Well displayed in The Imitation Game, Alan Turing designed a computer amidst World War Two, designed to decode Nazi enigma. Yes, because of poetic licensing some of the story was over dramatized, but it did portray the intellectual difference between Turing and his co-workers well. There were many cases in which he tried to explain his own invention - that saved thousands of lives - to those in charge of him, but they could not understand his work and almost scrapped the project because of a misunderstanding.