"A frightening moment for many San Francisco residents as a slumping crane rests on the metalwork around the Salesforce tower on Friday.
"The Division of Occupational Safety and Health (Cal/OSHA) was called out to the building Thursday as the crane was being dismantled. Officials are calling the slump a rooftop mounted derrick.
"According to Cal/OSHA during the dismantling process, the cranes boom ended up slumping and came to a rest on the ornamental metal outside the building.
"The building was not damaged and there were no injuries."
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