Hikers from Mexico came across a small cave with what appeared to be a hairy mass inside — the explorers decided to poke the object, capturing the process on film.
Hundreds of spiders suddenly poured out of the seemingly furry nest, rushing across the grass towards the cameraman.
"Yesterday exploring Alamos, Sonora… what appeared to be an animal sleeping in a cave turned out to be something more amazing!" the author of the video said on Twitter.
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The video was captured on 29 December and has already received over 1.65 million views on Twitter.
The spiders were later identified as pholcidae, usually known as cellar spiders or daddy longlegs.