In sense “abrupt transition”, contrast with segue
(“move smoothly from one subject to another”), which is etymologically opposite (“does not follow” vs. “follow”). However, segue
has connotations of moving between distinct
subjects, and thus to segue
often means to change rather abruptly, with at best a pretense of smooth transition – in both cases there is often a rapid move between distinct subjects, with the distinction being whether this is done smoothly or not.