So I was just parked right next to a curb in a lot. It's a kind've awkwardly placed curb, so I completely forgot about it. I backed up while turning sharply, and my front, driver side wheel ran into it. Since then, I've been hearing and feeling a noise as if a ball is hitting a wall as I'm stopping. It's right underneath the driver side floor mat area. I just took a look under the car, but saw nothing out of the norm. Anybody have any idea what this could possibly be?