The spooky clip has terrified users online who claim the moving ground could “open up and swallow” unlucky passerbys.
Explanations behind the strange phenomenon have ranged from the beginning of a sinkhole to more sinister reasons.
The video captured the forest ground moving near the Apple River in Nova Scotia, Canada on the day of Halloween.
Brian Nuttall uploaded the video the day after – and it was already been liked on Facebook more than 13,500 times.
Many viewers were left spechless by the video.