an actual error or mistake (misplaced action, or mis-spoken dialogue by a performer), usually embarrassing or humorous, made by a performer during filming; also known as a goof, flaw or flub; see also continuity Examples: in Jurassic Park (1993), the name of a common dinosaur (Stegosaurus) was spelled incorrectly; in the cafeteria scene at Mt. Rushmore in North by Northwest (1959), a boy extra in the cafeteria of Mt. Rushmore plugs his ears before a gun goes off; or in The Invisible Man (1933) when Claude Rains strips to avoid police, he leaves visible shoe prints in the snow; probably the most frequent flub in films is the appearance of the boom mike