Up Next
Mysterious Noise Heard in Salt Lake City Neighborhood Revealed
May 21, 2021
What is that noise and where the heck is it coming from? The mysterious sound was captured on a doorbell cam in Salt Lake City, Utah at 5 a.m. Neighbors called 911, but no answers were found, though several theories were floated online. Some said it sounded like a windmill, a mild mongoose, or even an alien invasion! But in fact, it turned out to be a slackline, a thin piece of nylon used as a portable tightrope between trees, that was whipping in an intense wind.