There was a car crash in CNY last week where two high school senior girls were killed, one being ejected from the car.
I haven’t found anything about whether they were wearing seatbelts or not, but presumably, since the one was ejected, she at least, was not.
That is sad. One of the primary functions of a safety belt is to keep occupants from being ejected. Side windows have little containment value in a collision or a roll over. You probably would not believe how easily they are broken.