Three people rappelled down the side of San Francisco's most eye-catching skyscraper on Monday afternoon.
For once, the stunt wasn't part of any kind of demonstration or activist group trying to get their point across.
Instead, the captivating display was part of a performance by Bandaloop, a dance troupe based in nearby Oakland, known for its aerial performances worldwide.
Spectators gathered down below were astonished as the trio, clad in orange jumpsuits, slowly descended down the side of the Transamerica Pyramid carrying out flips and spins all while suspended from ropes as part of a high-flying act.
The concrete structure, the second tallest in the city, is one the city's most iconic buildings.
Three people rappelled down the side of San Francisco's most eye-catching skyscraper on Monday afternoon.
For once, the stunt wasn't part of any kind of demonstration or activist group trying to get their point across
Three people were spotted rappelling down the Transamerica Pyramid building in San Francisco on Monday
The trio were part of Bandaloop an aerial vertical performance troupe from Oakland
Spectators gathered down below were astonished as the trio slowly made their way down
San Francisco police confirmed that the performance was done with permission
The 48-story building has been a recognizable part of the skyline since it was built in 1972.
It remained the tallest building in the city until 2018 when the newly-constructed 60-floor Salesforce Tower surpassed its 853ft height by a further 200 feet.
The gravity-defying dancers have more than 30 years of experience in vertical dance with the troupe having recently reopened its studios in the city.
Although the dance was a pre-planned event, it saw the San Francisco Police Department sent out a tweet confirming that the stunt was being carried out with their permission.
'Heads up! The individuals seen rappelling down the #TransamericaPyramid are part of a PERMITTED PERFORMANCE. Do not be alarmed, enjoy the show!' SFPD tweeted.
Bandaloop have scaled other iconic Bay Area structures in the past including the San Francisco library and the Oakland's Breuner Building.
Three individuals clad in orange jumpsuits slowly descended down the side carrying out flips and spins while suspended from the ropes
Helicopters captured the moment the three made their way down the side of the structure
The Transamerica Pyramid, the second tallest structure in the city, is one the city's most iconic buildings
A beacon from the top of the pyramid can be seen from all over the San Francisco Bay area at night when lit on special occasions. A red flashing aircraft light, required by the Federal Aviation Administration, sits at the top of the spire (pictured)