He doesn’t know that behind the window there’s a voyeur filming him
This guy felt the need to pee while on a busy street full of people and thought that positioning himself in front of a window on the street corner would be a safe place and away from prying eyes. So he thought he would pull out his cock and take a quiet piss. But he did not realize that behind the window someone was filming him with a camera: and here is the candid video of this lad caught peeing in public.