Recently, we purchased some kind of large plant for the backyard, and it came in a cheap plastic pot that you usually discard once you get the plant in the ground (don't ask me what kind of plant....I think it began with an "H").
The disposable pot was left in the backyard until garbage day. We got a ton of rain recently, and forgot about it, and it filled up with water (along with a bit of potting soil still in it). Yesterday, my wife picked it up and carried it to the side of our backyard, where there are some trees, and dumped it out. Out poured the water. Out poured the potting soil. And out poured a very dead rat, covered in potting soil.
(It's OK, you can shudder, I know I did when I heard this story)
I'm guessing the rat climbed in for some stupid, suicidal reason, and couldn't get out and drowned.
The disposal of dead animals tends to lie on my back. When our cat Kramer died a couple of years ago (while sleeping on our bed), I had to lift him up and wrap him up to dispose of him at the vet. When our neighbor's very large Ridgeback/Doberman mix died, I helped another neighbor (the owner is a small woman and is not moving a dog that is sheer...ahem....dead weight) move him out of the house before their daughter came home from school and saw the dead dog on their kitchen floor.
On another occasion, a bird flew into our back glass door, breaking it's neck. I recalled my disposal method on that occasion, and decided to dust that one off and try it again. It involved this:
At 9PM last night, under the cover of darkness, I went outside with a shovel. I scooped the rat up with the shovel and carried it back to our back fence. Because of the shape of our streets, there are four houses that border our backyard, and two others whose backyard is maybe 20 feet away. So, perfect lacrosse style, I flung the dead rat hard, trying to clear the immediate neighbor's backyard and landing it 2 houses away in thick brush.
Unfortunately....because when dumping dead animals, there's almost ALWAYS an unfortunately....it hit a low-hanging branch in the yard next to mine, which stopped the rat mid-flight, causing it to drop right there, less than 10 feet from our fence. So there lies the rat, not far from our fence (fortunately covered in fallen pine needles, and if not, then I'll throw a shit-load over so that it is), much too close for my comfort. Not that it'll come back to me, but just because I don't want dead things near my house, it skeeves me out.