A MUSEUM worker has spotted some spooky behaviour on a surveillance camera.

Footage from Brighton Museum’s CCTV shows a cup suddenly falling and crashing in the middle of the night.

Moments before the smash, a mysterious flash of light can be seen. 

Digital Manager Kevin Bacon said no one was near the display when it fell at 3am on Wednesday, July 10.

Upon hearing the crash, security rushed to see what had happened and found a cup from the retail display had fallen to the floor and smashed.

The video has caused a great deal of puzzlement.

Theories range from ghostly activity to a burst of static electricity, but a convincing explanation has yet to emerge.

What do you think it could be?