Eerie footage shows Slovakian freediver descend into murky abyss

Eerie footage shows a freediver descend into a murky abyss in a river in Brezno, central Slovakia.

Filmed on August 2, the video shows the diver slowly descend into the murky water, disappearing out of sight.

After a few nervous moments, the diver then appears out of nowhere returning to the water's surface.