rubberneck
Definitions
To turn one's head to stare at something in a foolish or curious manner, especially at the scene of an accident.
To look around or observe something with exaggerated curiosity.
Examples
Traffic slowed to a crawl as drivers began to rubberneck at the accident on the side of the highway.
It is dangerous to rubberneck while driving because you might miss a hazard in your own lane.