No...it's not when you drive a mini van like the one to the left...even though that is the typical answer.
Look at the back door carefully...see that smudge above the body molding but below the window???
Look very closely...
OK - did you figure out what it was yet?
Does this help?
Yes - you guessed it...apparently, my child rolled the soccer ball in dusty sand and then rolled it up on my car...I almost hate to wash it off. ALMOST! Sun just went down...off to wash the car now! Enjoy!