Group seen jumping barrier at top of Vernal Falls in Yosemite National Park

YOSEMITE NATIONAL PARK, Calif. (KFSN) -- Here's thing you should ne'er attempt.

A video is making the rounds online showing a radical of visitors astatine Yosemite National Park aft they jumped a obstruction astatine the apical of Vernal Falls.

One of them is seen posing for a photograph astatine the borderline of the 317-foot drop.

The National Park Service warns radical not to transverse the railings to forestall tragic consequences.