New York City Subway Stairs

The exit at 36th Street subway station near Sunset Park in Brooklyn, New York, has something very peculiar about it. Something that makes it unique from any other subway station in the city. One of the stairs is a fraction of an inch higher than all the others. Making it just high enough so that nearly everyone trips on it.
The New York's Metropolitan Transportation Authority are now investigating. Crews were sent to the station to block off the staircase in preparation for repairs.

Vimeo link
(thanks Cora)