I've seen riders do that in races with a teammate on their wheel.
"Hey Bill, I'm right here..... move left."
Nothing.
"Bill, it's me. I'm on your wheel. Scootch left."
Nothing.
"Bill, we drove to the race together. We're friends. Move..... left!"
Nothing.
"Bill, you stood up at my wedding. Our wives are shopping right now. Move left."
Nothing.
"Bill, I'm your insurance agent. Give me some room here."
Nothing.
Some people's children...