The Manchester Museum in England can’t explain why a small statue made as an offering to Osiris–the Egyptian god of death–has suddenly started spinning on its own.

In a story that sounds straight out of an “Are You Afraid Of The Dark” episode, the 4,000-year old artifact–which was found over 80 years ago in a mummy’s tomb–was recently caught on video moving around by itself, and the museum curator says he’s the only one with a key to the case it’s in.

“I noticed one day that it had turned around,” Campbell Price said. “I thought it was strange because it is in a case and I am the only one who has a key … I put it back but then the next day it had moved again. We set up a time-lapse video and, although the naked eye can’t see it, you can clearly see it rotate on the film.”

Price, who is an Egyptologist, has one explanation for the movement:

“The statuette is something that used to go in the tomb along with the mummy. Mourners would lay offerings at its feet. The hieroglyphics on the back ask for ‘bread, beer and beef’. In Ancient Egypt they believed that if the mummy is destroyed then the statuette can act as an alternative vessel for the spirit. Maybe that is what is causing the movement,” he said.

He does say that one theory offered up has to do with friction–the heavy stone artifact coming into contact with the glass shelf it rests on may be vibrating with outside movement–but says that doesn’t explain why it turns in a circle, or why it’s never moved before. Also, it’s sitting beside other relics that don’t appear to be affected at all.

Price says anyone with a viable explanation is welcome to come visit and have a chat with him.