Maybe a blind guy with a cane too? He may have missed the walk signal.
BTW, crosswalk lights sometimes malfunction, not often, but it happens.
Google sometimes malfunctions too. They may be able to see abnormal CTR, but there's no way in h3ll they always know the motivation for it. Greed, hurting a competitor or enemy, or some seo just testing on a 3rd party to see what happens.