Been thinking about that ball bearing bouncing down the slopes of the Rockies.
If it's big enough to do all the bouncing I'm envisioning, then it probably would leave some pretty big dents along the way, so....
How about one of those super bouncy-balls. Once it gets to the bottom of the slope, it wouldn't roll, but would continue to bounce bounce bounce over the landscape.
Wonder how long it would take for the last bounce?
Shalom