ANSWER: Motorcycle muffler end (last few inches, the rest remained on the bike).
While driving home from Frankfort yesterday I drove over a silver object which was rolling across the road. Once the item went under my van it created quite a racket. I looked at the rear view mirror to see it's departure, however, it didn't appear. When I got home I looked under the van for damage. I did not find any, however, this little jewel was lodged near the rear axle. Do you know what it is? (I do, just thought you might find it interesting)