Set collapses on to audience at Roundhouse in Camden
18 January 2014 Last updated at 18:42 GMT
Three members of the public and a performer were injured when part of the set collapsed on to the audience during an acrobatic show in north London.
It happened at the Fuerzabruta show at the Roundhouse in Camden on Friday night.
BBC London's Emma North spoke to eyewitness Steve Johns and Camden Roundhouse's Marcus Davey.