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"
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"All it takes is for somebody to see me - and I could just die, just like that. I could want to go to the shop and not come home."
Before the killing, Peters searched the internet for "serial killers", "treatment of child killers in prison" and "premeditated murder".
Arriva Rail North, Greater Anglia and South Western Railway are all affected.