What's weird about the actions of the self-driving vehicle in this case? It detected that a truck was backing into it's path, and stopped in an attempt to prev

What's weird about the actions of the self-driving vehicle in this case? It detected that a truck was backing into it's path, and stopped in an attempt to prevent a collision. The truck driver didn't properly check his mirrors and continue backing up which resulted in the truck 'grazing' the front bumper of the car. What exactly is a human supposed to do differently in that situation? Attempt to continue driving straight and potentially end up being t-boned by the truck instead? Also, this vehicle looks super weird already. If the truck driver didn't see it, a 'placard' isn't going to make it more noticeable.