[nynor]

it is the impact of the shell. the way the egg breaks on impact, the shell breaks in a circular pattern, folding in such a way that the sharp edges of the fractures gouge the paint.

if the egg had hit anywhere else, there would be concentric pattern of circles, the size and shape of the egg. i've seen it on my friend's car.

as it is, it removed about a square centimeter of paint from the mirror stem, down to the coating.