it's cottonwood season!
ok, well that was off topic... I would feel sorry for anyone who had an open motor and drove through a small pile of cottonwood seed things... (if nothing else it would be tiresome to clean off, but it could cause a short in the motor...)
Ok, so I am just ranting about cottonwoods... (either that or you destroyed a cotton field with your buggy, but I will assume that it is cottonwood tree seeds...)