Professional kitchens do this. Well some, at least.
To avoid collisions with other staff members scurrying around a busy kitchen, it’s considered polite to clearly say, “Behind,” as you pass behind another person. This is even more important if you are carrying a full tray of food, a hot pan, or a rack of glassware.
When I worked in a kitchen, i was taught to say “Knife!” any time I was moving from one station to another holding a knife, same with “hot pan”. The person who trained me did not respond verbally when I asked if there were any particular reasons for the “knife!” instruction, but I heard from others that there was good reason for it.
Professional kitchens do this. Well some, at least.
https://www.webstaurantstore.com/article/511/kitchen-slang-phrases.html
When I worked in a kitchen, i was taught to say “Knife!” any time I was moving from one station to another holding a knife, same with “hot pan”. The person who trained me did not respond verbally when I asked if there were any particular reasons for the “knife!” instruction, but I heard from others that there was good reason for it.