Today i was driving along and heard a metallic "ching" noise as if something fell off the car and hit something solid and metal(like a drain maybe). About 3mins later when I was slowing down there was this loud scraping noise as if something was dragging along the road underneath the car. I was just coming to a stop when the noise abruptly went away as though whatever it was just fell off. However when i checked the car underneath and all around, there was nothing. I checked all along the road too, still nothin. Very strange..... Any ideas?