You're approaching the end of an excellent flight on a lovely day; life is good. Now, on downwind with the speed down into the gear extension range, you move the gear handle to the down position, keeping your hand on it until you get a solid gear down indication—as you've done scores of times.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/technique/yikes-ive-gotta-land-gear-up