If you've never seen this, it's pretty eerie! The Haunted Mansion really seems to be haunted!
The video focuses on a bank of monitors, and appears to have been filmed by a security guard.
Watch carefully - you can see the ghostly figure of a human taking a happy little stroll away from the Mansion, after business hours at the park.
The original source says no way is it just a reflection on the monitors - the proportions just don't work.
And watch for this shot, where the ghost appears on two monitors at the same time:
Here's the video!