Who. Did. This?!

A prankster managed to alter the iconic sign welcoming people to South San Francisco early Friday to read “The Industrial Tity,” instead of “The Industrial City.”

Eric Deaver shared the 17-second video showing the altered lettering on Sign Hill Park.

The sign was originally painted on the hill by the Chamber of Commerce back in 1923 and signified a boom in the city’s incorporation in thanks to several steel companies.

Each letter is reportedly about 60 feet high.

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