Everything is safe
We all forget things from time to time while going out but this driver forgot something of great significance, yup you are right, the door. You must be wondering how long it took the driver the realize that they were driving the truck without a back door.
We cannot look at the picture and not think how many of the total parcels could have fallen out of the truck and smashed under the tires of some vehicle. We really hope that someone had told the driver before something actually fell from the completely open truck.