Terribly sorry if this has been posted already but a tumblr posted a video of Gemma with the caption:
Here is the video which seems pretty recent. Her and her friends build a candlelit chandelier (which looks like an enormous fire hazard).
I'd say it looks more like a jar falling on your head hazard..maybe also a hot wax hazard. But for the latter you could just use a napkin to soak it up, and quickly peel the hot wax off of somebody's head.
Magdalena Frackowiak, Gemma Ward, Lily Donaldson, Cailin Hill, Rachel Clark, Natalia Vodianova, Sara Ziff