Circus acrobat falls 30-feet in front of screaming onlookers

Jackie Armstrong slipped from her harness and fell to the floor

An acrobat slipped from her harness and plunged 30 feet during a circus performance in London on Monday.

The accident happened at the Zippos Christmas Circus Show, during a performance of Cirque Beserk at the popular event at Hyde Park, according to Mail Online.

Staff rushed to help the artist, Jackie Armstrong, as the tent was quickly cleared of horrified audience members.

"The lady had one foot in the loop with no actual harness and her foot slipped out and she fell to the floor diagonally. Kids were on the front row and there were people screaming. She was yelping in agony, it was traumatic as she bounced after she hit the floor," an eyewitness stated.

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Armstrong was moved to the hospital but her condition is still unknown.

The 35-year-old graduated from Christchurch University in Canterbury with a degree in theatre studies before joining Zippos as an aerialist.

In 2011 she met Valter Jonas, 33, a motorcycle stunt rider when he joined Zippos as part of the "globe of death" act - in which motorbikes zoom around a spherical cage.

The two are now engaged and have a one-year-old baby girl, who they regularly take to work with them.