Unusual and extreme hoarding disorder.

W. YARMOUTH, Mass. -- Police said it's not a cause usually found on accident reports.

But police said a mountain of trash that piled up from top to bottom in a woman's car caused a small crash in West Yarmouth on Saturday.

The woman lost control of her red Ford Focus while backing out of a parking spot at the West Yarmouth Post Office.

The car jumped a sidewalk and struck another car.

Officers responding to the scene said thousands of coffee cups, food bags and other articles of trash had fallen onto the car's accelerator.

They said the car was filled in all seats, from top to bottom, with garbage.

Officer John Dimitres says the woman suffers from a quote -- 'unusual and extreme hoarding' disorder.