In what appears to be a variation on the "chicken" game, an Arizona teenager accidentally ran over her 17-year-old brother.
The girl, whose name and age are unavailable, had just dropped her brother off at Mesa, Ariz.'s Superstition Springs mall Saturday evening when it happened.
Mesa Police spokesman Ed Wessing says the duo started playing with the car in the parking lot.
The brother reportedly jumped in front of the vehicle as the sister slammed on her brakes to avoid hitting him.
During their last game, the girl was unable to brake soon enough and ran over her sibling.
The boy was rushed to a local hospital in critical condition, but was later pronounced dead.