Yup...2yrs ago I ran over ne in the back alley while she was crossing really fast in front of me with babies on her back.
I broker her back and she pulled herself with her front claws to the side, with 1 or 2 babies still hanging on, the rest had been flattened. I'm like "great, what do I do now?" I hate them but don't want to see them suffer. I go back to the house, get my 1200fps pellet gun, drive back down the alley, aim the gun out of my window, and I put 2 in the back of her dome piece. The I finish the bother baby(s) as there is no way they are going to survive without their mom.
I took about 7 opossums out that night.