The act of rolling boulders off of cliffs, hillsides and other high places. Usually restricted to rural or wilderness settings scoring methods and terminology vary reagionly however the general theme is distruction.
The Baja method awards points for the amount of cactus destroyed only when the trundled stone reaches the water, in what is termed a "Grump". Distruction of any "valued property or life" is generaly avoided.
"Dude, trundle that rock off and see what you can hit."