that brings us to physic.....Newton's law and etc
laws.....
if 2 tipper trucks travelling at opposite direction toward each
other at velocity of 90km/hr, both weighing 2 tonnes each, then
they will both crash their front but drivers will survive from the
crash...
if 1 car travelling toward a stationary tipper truck at speed of
90km/hr, then regardless of the weight of the car, the car will
crash badly and wrecked from the impact and driver will die....