1) N. Korea nukes S. Korea.
2) War breaks out for a week or so until N. Korea threatens USA.
3) USA pulls out a nuclear powered fly swatter and turns N. Korea into a cinder.
4) China threatens retaliation but in the end it fizzles out because neither of them is stupid enough to nuke their biggest investor (or whatever).
5) Diplomats & international faces mourn S. Korean losses and the rest of the world lols about N. Korea's demise, Frankie Boyle leading the racist, mutant based humour.