A guy was parked in his grandma's driveway to drop-off some food, when a man came up and tried to carjack him at gunpoint.
But when the carjacker got in the car, he kept revving the engine to drive off, but the car never moved. The car was in PARK.
And the carjacker couldn't figure that out, so he eventually got out and ran away.
The cops are trying to track him down.
This happened in Pittsburgh.