The Grand Canyon is a place of precipitous cliffs. It is not a comfortable place for those with vertigo or fear of heights. But I have noticed that most of the people who come to the Park do not have an appreciation for the exposure of the cliffs. Without going down into the Canyon, you cannot appreciate the vast distances and the huge heights of the walls of the Canyon. So I see people dancing on the edges and it explains why they occasionally fall into the Canyon.