Back in the Xtreme days, former Rollerblade employee Chris Morris developed a shoe with a plate in the sole for grinding rails and curbs. This video oNe was a showcase.
I wanted these more than life itself, but they eventually disappeared from shelves and skateboards had to suffice.
I imagine there being a commercial where some old man (let's say 40 or so) says, "You kids need to stop grinding your skateboards on these rails or I'll call the cops."
And one of them says, "What skateboards, gramps?"
And he looks around and his jaw drops and everyone does secret handshakes and laughs except for the old man who scowls and shouts something irate that gets drowned out by cool boombox music.