If you think the movie "Texas Chainsaw Massacre" was scary, watch this prank inspired by the horror movie.

Viral video producer VitalyzdTvSecond uploaded their scariest prank yet. It’s the Chainsaw Massacre prank inspired by the horror movie “Texas Chainsaw Massacre.”

This prank was uploaded on YouTube last October 15, 2014 and after four days, it already garnered a whopping 20,342,822 views, one of the channel’s greatest hits ever.

Watch the prank and find out why it went viral instantly: