This is the moment a Florida college student inspects a drainage ditch he thinks is moving due to the wind, but instead gets a bizarre surprise.
Filmed by Ezra Wilkes, the vibrating and moving water turned out to be thousands of tadpoles all bundled together in a tight space.
He later told Newsflare: "This was taken at my campus, in the drainage ditch outside my dorm.
"A few of my classmates and I were working on moving the tadpoles to a nearby pond, as clearly there was not enough room for all of them in the drain."
See what happens in the video above.