Final answer:
The excerpt translates Stephen King's ideas from 'Danse Macabre' into a scene where an unlikely 'dancing partner' emerges unnoticed among happy tourists, creating a contrast that's essential to the horror genre.
Step-by-step explanation:
The excerpt exemplifies the ideas Stephen King describes in "Danse Macabre" by introducing an unlikely “dancing partner”. This is characterized by the presence of a figure with 'blistered and raw' skin and 'hideous eyes' emerging from the surf, unnoticed by the happily preoccupied tourists. The juxtaposition between the ordinary, joyful scene on the beach and the sudden appearance of a grotesque figure embodies the incongruity and the juxtaposition King discusses, which is a common element in horror. The figure represents the dance with the macabre or the horrific that catches characters and readers by surprise, creating that potent emotional reaction King considers essential to the horror genre.