She tells E! Online, "It was like this World War I rifle. This guy was coming to stab me with a bayonet, and I duck and it kills the guy behind me. And so on this one take, the timing was just a little off because it was all so close and so precisely timed that the bayonet just stuck the side of my head when I went down.
"I didn't need stitches. I was actually saved by the metal hairclip that was in the side of my hair, because I remember when it hit I heard this, ting, like a metal-on-metal sound. But yeah, I had blood down my face. I had to clean up all the blood and keep going.
"It was awesome! We were shooting this scene all day long and it happened halfway through the day, so it was like a hit of adrenaline that I could take with me."