GRAND CANYON NATIONAL PARK, AR - JULY 14: Visitors stand at the Grand Canyon South Rim on July 14, 2014 at Grand Canyon National Park, Arizona. The Grand Canyon is among the state's biggest tourist destinations. (Photo by Sean Gallup/Getty Images)

A 20-year-old woman was taking photos with her mom at the Grand Canyon . . . when she lost her footing on a ledge and almost fell.

She managed to catch herself, but it could’ve been tragic.  A different park visitor just happened to get it on video.