Even if you are the victim of car damage or personal injury due to an improperly loaded truck, you should never attempt to speed after a truck or try and stop it personally. Overtaking a truck in normal circumstances is already a very dangerous thing to do, because of the large blindspots a truck has on all four sides.  The best (and safest) course of action that you can take is to call the police and report the incident. If you’re able to pull your vehicle over, do so at your earliest opportunity, to stop the car and check the vehicle and yourself for damage and injuries.