I was going over to the office gym at around 9pm tonight -- it was the lawn area in front of the gym, and it's not particularly well lit. I saw a white shape darting across the lawn, stopping at a tree.
At first I thought it was a trick of the light, but as I got closer, I saw the bushes just past the tree were still rustling. The white shape was a Wegman's plastic bag with a takeout container inside, presumably trash from a nearby garbage can. So I'm guessing a fox, raccoon or possibly a badger of some sort had grabbed the trash, and ditched it at the tree and bolted for the bushes as I got close.
That was probably the highlight of my workout, which was light legs and shoulder, finishing up with about 10 minutes of jump rope. (13 minutes of rope time, minus about 3 minutes of pausing, gasping and panting.)