Everything that is in motion will eventually stop, either gently or with a sudden loos of kinetic energy, I prefer to stop my RV and toad gently rather than suddenly, it is better on my body and the wallet.
E=mc2 tends to be a little to sudden a change for me, the shock wave alone is just to much for me to handle, I still think we all should have Conestoga wagons and a pair of oxen, we would really enjoy nature, and think of the interminable vistas we would enjoy with every step.
Live long and prosper my fellow travelers.
navegator