One phenomenon of moving around the countryside is that Uphill is a lot harder to achieve than Downhill.
In our Rhino efforts to conserve Energy, Downhill appeals to Us, right? Whether by wheel, toboggan, ski, or sled, Downhill is swift and terrible; what could be nicer?! (For the sake of discussion, We are assuming that a Rhino comes safely to a stop near the destination.)
Uphill poses the problem; how badly do We want to get there?