Emily Koford and her mom Erin were visiting the Grand Canyon from Texas when they decided to take a picture for some memories.
While Kevin Fox watched on from a smaller observation on the south rim of the canyon, 20-year-old Emily can be seen backing up to get more of the scenery in the shot.
Not watching where she is stepping, and with no guardrail to stop her, her right foot slips off the rock and almost sends her stumbling to the ground below.
Check out her mother’s reaction at the end.