Yet Another Message From the Heavens?

Yesterday, at noon, waiting for the bus to Springfield at Framingham Shoppers World, Marash Boy and Marash Girl took shelter from the sun by standing under the shade of a maple tree.  Very soon, however, a large chunk of bread (which appears to be a very small chunk of bread in the upper left corner of the photo below) bounced off of Marash Boy's head and landed in the parking lot, thanks no doubt to some ne'er do well sparrow who had dropped the chunk as he flew out of the tree.  What is going on?  (See previous blogs for July 8th and 9th.)

Bread in upper left corner; tree's shadow to right.