According to Mexican media reports, the odd occurrence took place in Veracruz, but few details are known about it.
The video seems to show a dog running along a fence before turning into a white blur that then transforms into a running man, which quickly takes shape and becomes more solid. The man then continues to run off-screen as the video ends.
Some viewers feel it is a Nagual. In Mesoamerican folklore, a Nagaul is a human being who can access spiritual power through transformation or deep connection with their animal counterpart.
Others who've see the clip are less convinced and suggest the "transformation" is just a camera glitch, while some skeptics think the footage was edited and altered.
For now, there is no official explanation for what happens in the video.
Watch below…