The flag's shadow is out of frame, you can see how long Buzz's leg shadows are, and the flag pole is taller. If you look closely you can see the flag pole's shadow (straight line above Buzz's leg shadow)

EDIT: If you look at another photo it shows the flag's shadow: https://shorturl.at/uSl7T

The flag's shadow is out of frame, you can see how long Buzz's leg shadows are, and the flag pole is taller. If you look closely you can see the flag pole's shadow (straight line above Buzz's leg shadow)