We were about half an hour into the spectacular Fuerzabruta performance, when one of the big vertical acts - a sail likestructure with two performers on top - collapsed into half of the audience.
It was hard to work out what had happened at first, but we were quickly ushered out and it was clear something had gone very wrong.
Luckily, it sounds like there were no serious injuries"
More top news
A man in his 20s is dead and a 17 year girl has hand injuries after a stabbing in Tooting
Roads were closed in Barnet after a water main burst on Graham Park Way causing flooding and low water pressure.
Five police officers were hurt as they tried to break up an illegal rave at a dissued bank in south east London.