Something Thrown At Me

I was in the bathroom,just finishing up washing my hands and drying them. As I was finishing drying my hands I felt a slight hit in the back and heard something hit the bathroom floor. I looked to see what it was and found nothing. I got my youngest daughter to help me look and still found nothing. As we were walking out the bathroom we seen a bret laying in the hallway. I had my daughter pick it up, we didn't see this bret before. I had her go in the bathroom and throw it on the floor and see if it made the same sound I heard and it did. Not sure if it was the bret or not that got thrown,but it seemed and sounded coincidental. Little edgy feeling with this happening also.