If you ever run over an opossum, stop and check if she was carrying babies. Bring them or report it to an wild animal rescue.
If you don't do this, then you will run over a porcupine who will puncture your tires. ;)
I actually removed the babies and took them to a shelter once.
“If you ever run over an opossum, stop and check if she was carrying babies.”
If so, be sure to back up and run over them as well!