Anyone who has seen Gone Girl will know that there was one particularly gory scene which you may have watched through your fingers.
And it involved Rosamund Pike and Neil Patrick Harris…on a bed… with a box cutter.
Yeah we know, the memories are stressing us out too.
Reflecting on her preparation for her role as Amy Dunne in the gripping thriller, Rosamund told Graham Norton that in order to play the part to the best of her ability she enlisted the help of a local butchers… and a Dora the Explorer doll.
Opening up about the scene which saw her character kill her former boyfriend during sex, Rosamund said: "I'd never cut anyone's throat so I went to a local butchers and with great determination set about the carcasses with a Stanley knife in full view of customers."
And not only did Rosamund get knife-happy in front of the locals, she also did a little improvising with poor ol' Dora.
"I rehearsed with a Dora the Explorer doll in my back yard, probably in full view of the neighbours!" she laughed while chatting about the movie which had audiences on the edge of their seats back in 2014.
And if anything, this little reveal has made the whole thing even more terrifying.