If you have ever encountered a neighbor at your local supermarket hollering “Corner” while hurtling around the end of the cereal aisle, chances are you narrowly missed slamming into a person who works in a restaurant.
(I will neither confirm nor deny that I have shouted “Corner” in public spaces like farmer’s markets, parking garages, and the market down the street from my apartment.)
Restaurant staff work constantly in tight quarters with hot, heavy, cumbersome plates of food and trays of martini glasses, and so some strategies develop to make it less likely that a bartender with a tray of glassware will collide with a busser laden with arm-loads of dirty plates. When rounding a blind spot in the restaurant floorplan– generally near the major entrances and exits to the kitchen, bar, or scullery– if one listens intently, one may hear a chorus of “Corner” being performed throughout the night.
Get close to the kitchen, and you might also hear such juicy tidbits as “On your back!” And “Hot Behind!” Or their spanish cousin “Atras!” All of which serve the same general purpose; to keep folks from crashing into one another and spilling a tray of hot shortribs all over the floor.