If the bottom is flat like the slanted top, it is not likely to roll, but flat strata rocks are rare in this country. Photo from 50 yards away taken through windshield with heavy snow falling. The rock is as wide as the main haul logging road, ditch to ditch or more.
(http://i152.photobucket.com/albums/s199/lokanagan/waterfalls%20mtns%20rivers/IMG_6884_zpsfd640090.jpg) (http://s152.photobucket.com/user/lokanagan/media/waterfalls%20mtns%20rivers/IMG_6884_zpsfd640090.jpg.html)
Shoulda nudged it around a lil :laf: