Stuff one finds when removing front fenders?

Not while disassembling but......in the 70s my body shop did warranty work for the local AMC dealer. A customer had a car that made a "thumping banging noise" at most stops and some turns. It turned out that a one inch nut was hung from a shoelace in the panel under the left rear window. Someone must have been bored or mad on the assembly line the day that car was assembled!