Strange find?

I always heard a rolling (something) in the car around corners at times not often but enough to start looking everywhere I could think of, never could find it! Sounded like a screw or nut rolling around after looking high and low...I knew I would not find it or let's say never find it! Then I bought a new speaker phone and was looking for a place to mount it. I took off the side pillar plastic (air bag) for the driver side and it had six tiny acorns in it! Small animals must be able to access that? Seems dangerus to allow that? All the way up by the head liner! Could have chewed some wires to that bag! 2010 bewear!

 

Kept the acorns very small...research origin never seen them so small but not a acorn expert