Hikers have reacted with disappointment and horror after a man was recorded throwing large rocks into the Grand Canyon, The video which was shared on Instagram account TouronsOfNationalParks last week, shows the man hurling a rock the size of his fist over the rim, where it could have hit a person hiking the trails below.
"Not cool my friend, not cool," wrote one commenter. "This is why National Parks are putting in more and more restrictions. You’re better than this."
