Strangest thing found in your A body???

I took a rear quarter panel off a 68 Valiant, and there was a horizontal piece of frame, just below where the window would reach its lowest when cranked down.
ANyway, on it was a joint. All I can figure is that someone pulled the inside panel out, and hid it there, possibly to smuggle it into Canada (car was in Detroit). That, or a dude set it there during assembly. Or someone pulled back the window felt and intentionally dropped in in there. I craved a smoke, but it was useless.
Quite frustrating. Equally frustrating was buying a 97 Sable, finding a cd in the cd holder, only to find it was a Raffi cd.