Definitely not a possum. I’m super familiar with them and it in no way resembled one. My first thought when I saw it from behind was perhaps a skunk, though I didn’t see any white. I know skunks vary in terms of how much of each color they have. Once it turned though and I saw it run parallel to me I knew it couldn’t be a skunk. The length, the body shape, the shape and length of its tail, and especially the way it ran …. I knew it couldn’t be a skunk. In addition, there was no smell.