Goofily enough, the sniglet that inspired this was sort of an anti-accident one. :p In any case, I see this scene as Cynthia and Amethyst (from the previous picture) sitting at a traffic light when something about a nearby vehicle caught Cynthia's attention.
Link
The Syreth Clan
Oh-oh, she gotta watch out, lest the next mini-theme might be 'Car Accident'.