When a character implies that he or she will be finished doing a task quickly, they'll infer that they'll be done by the time a character says a certain word. Lampshade Hanging
can occur if the character is actually gone longer than expected.
Hey, you want to get to the bottom of this page, just press the "End" key on your keyboard. Depending on how fast your browser is, you'll be at the bottom faster than you can say Antidisestablishmentarianism