What happens at the moment of impact in a vehicle collision unbolted occupants are still traveling at the vehicles original speed?

At the moment of impact in a vehicle collision, unbelted occupants continue to move at the vehicle's original speed due to inertia. When the vehicle suddenly decelerates, these occupants can be violently thrown forward, potentially leading to severe injuries or ejection from the vehicle. This lack of restraint means they are at a higher risk of colliding with the interior of the vehicle or being thrown out of it entirely. The impact forces can result in traumatic injuries, including head trauma and internal injuries.