Horrified onlookers saw how man gruesomely ended his life by sliding down the HOOVER DAM.

An unidentified man’s body is seen rolling down the scale of the 726-ft long historic dam located at the border of Nevada and Arizona.

The shocking video was recorded by a tourist who couldn’t believe his eyes. “Oh my god,” he’s heard saying. “His head just exploded!” Stunned witnesses could be heard screaming in the background.

The video has become an Internet hit with more than 160,000 views. WATCH IT AFTER THE JUMP!