When I was a kid, sometimes my mom would sometimes spiral cut hot dogs, or more often she's cut diagonal slits in the dogs. Then she'd melt some cheese onto the dogs. I thought it was pretty darned fancy.
I've seen gadgets made specifically for spiral-cutting hot dogs, but I've always thought they were a little silly. I don't have a real need for a spiral cut dog. And I figured that if I wanted one, I could muddle through well enough with a knife.
But then I saw this in the book, Haute Dogs
After it's cooked, the dog keeps its shape even after it's off the skewer. Ta daaaaa!