YOSEMITE NATIONAL PARK, Calif. (KFSN) -- Here's something you should never attempt. A video is making the rounds online showing a group of visitors at Yosemite National Park after they jumped a barrier at the top of Vernal Falls.
One of them is seen posing for a photo at the edge of the 317-foot drop. The National Park Service warns people not to cross the railings to prevent tragic consequences..
