A humanoid robot attacked its handler while trying to break free from restraints.

In CCTV footage from a factory in China, the black robot could be seen attached to a miniature crane before it suddenly began swinging its arms back and forth.

The incident which took place on May 1 showed the human robot showing its displeasure, a man sitting behind a nearby computer began ducking while another man standing behind the robot backed away.

The robot, of its own accord, raised its arms in the air and brought them down again, repeating the motion with increasing speed and violence.

It then began walking forward as it thrashed around in an apparent bid to break free from the crane.

The men could both be seen flinching and cowering while raising their arms to shield their face as they moved out of its path.

The computer monitor toppled tp the floor and other items were knocked over from the desk as the men attempted to flee from the out-of-control robot. 

Eventually, one of the men pulled the crane from behind in a bid to stop the spree of destruction.