Who ya gonna call? Boulder Busters!

If there’s something strange sitting in your road
Who you gonna call? (Boulder Busters)
15 feet tall
In the northbound lane
Who you gonna call? (Boulder Busters)

I ain’t afraid of no rocks

Believe it or not, you're looking at the roadway of old US 89 (now US  89A) between Navajo Bridge at Marble Canyon and Jacob Lake on the Kaibab Plateau.  The enormous boulders were swept across the highway by a flash flood August 9, 2015.  ADOT actually called in the "Boulder Busters" to help reopen the road.  See: http://www.azdot.gov/media/blog/posts/2016/08/04/boulders-on-a-highway-for-us-89a-repairs-adot-called-boulder-busters