From CNN:

Story said the bear was probably drawn to a peanut butter sandwich left inside by his 17-year-old son Ben. He said the family didn’t realize what was going on until deputies arrived and the neighbor came back and called them. By then the car was no longer in the driveway.

Incredulous, Story, his wife and three teen children — who have lived in Larkspur for 17 years — rushed outside to see the red Toyota down the hill and near a tree.

Somehow, the bear had either opened the unlocked back door or pushed a window down to get inside. Understandably agitated, it bumped into the horn repeatedly and eventually knocked the car’s gear into neutral. The Toyota rolled down the hill. The door added to the bear’s indignity by closing at some point during the ordeal.

Previously on Clerks the Animated Series: