Possum? Wha?

So we came home tonight to find a possum in our garbage can! It had been raining, so it was just sitting there surrounded by garbage and water. Here is a picture:

We decided that we had better let it out, so we picked up the garbage can and dumped it out in the corner of the yard. It was pretty gross looking, and moving slow, but as you can see it still climbed the fence: