Tractor bizarrely moves by itself in farm in China

Video: https://www.dropbox.com/s/i3n3ddz844akdja/VRP39248.mp4?dl=0

This is the bizarre moment a tractor mysteriously moved by itself on a farm in China.

Footage shows the agricultural vehicle loaded with grains slowly approaching a scale before a worker rushed to pull its brakes in Xinxiang, Henan province on June 5.

Nobody was hurt in the incident, which is believed to have been caused by a mechanical failure.