Dunno about Korea...
...but stop-sign "I'm going first" is a common game here in Seattle. Same with using the exit ramp as a passing lane. Same with "cutting people off at the pass." All this behavior came about during the Californification of Seattle in the mid-90s.
Now, in Japan they use the car horn to say "You go first!"
Seriously.
"Here at Ortillery Command we have at our disposal hundred megawatt laser beams, mach 20 titanium rods and guided thermonuclear bombs. Some people say we think that we're God. We're not God. We just borrowed his 'SMITE' button for our fire control system."
