The accident didn't seem that bad. . . the plastic bumper bounced back into place and it didn't look like there was much damage.
Sometimes the damage isn't obvious. Be wary when accepting settlement payments from a driver that hits you or their insurance company. Significant damage to the car below was not visible from the outside. The damage to the bumper reinforcement and rear body is a safety concern if the car is hit again from the rear. And the trunk is going to leak in the rain or a car wash.
Maaco-Fremont repaired all of the damage on this car, replaced the crushed bumper reinforcement and energy absorber and repainted the damage area with factory paint.