You have the power of flight obviously, and you are in a crowded city square.
The entire vast blue vault of the heavens is yours to explore, you can glide with the sun warming your wings and look down on the recently evolved monkies trapped by gravity on the paving, and rise above.
But you are a pidgeon.
And therefore thicker than a whale omelette.
So that must be why you choose to fly across the croweded square at waiste hight, dodging through the crowds so you can get to the other side of said square to see what the tramp on the bench has just dropped on the floor.
It's not because you are a vindictive thrill seeking tick ridden vile nest of plague that just enjoys winding up workers on their lunch break is it?
Nah, thought not.

