Don't
push him down a mountain
roll
mountain lions??? Cascade Mountains???
The boulder at the top of a mountain has potential energy due to its position relative to the ground below. This potential energy can be converted into kinetic energy when the boulder starts to roll down the mountain.
The force that causes a rock to roll down the side of a mountain is primarily gravity. Gravity pulls the rock downward toward the center of the Earth, and when the rock is on an incline, this force causes it to accelerate down the slope. Additionally, friction between the rock and the surface may influence its movement, but gravity is the dominant force driving it downward.
* a slide of large masses of snow and ice and mud down a mountain * gather into a huge mass and roll down a mountain, of snow * a sudden appearance of an overwhelming number of things; "the program brought an avalanche of mail" See the Related Link.
A roll-down screen, would mainly a screen that well, rolls down. It could drop down, roll-down, fold down, etc. They are widely used for projectors.
The pebble has potential energy due to its position at a higher elevation. If the pebble were to roll down the mountain, the potential energy would be converted into kinetic energy as it moves.
Sisyphus
Cookin' with Cutty - 2001 Mountain Bike Roll Ups was released on: USA: 11 November 2012
A pancake can roll down a hill. The possibility of it is unlikely but it is possible.
drop down and roll