How many of us are there? Owners of Dodge based RV's?

I'm thinking Newton's Cradle is a better example than the one that I thought of...

Imagine riding on a crowded train/subway car, or a bus, and someone in the back shoves the person in front of them. That person bumps into the one in front of them, etc etc etc.

Nobody actually 'goes' anywhere, but the energy of the initial shove gets transferred to the front of the train/subway car/bus.