I love Carrie, and this is an amazing piece. I love the texture and blood swipes, the simplicity and the white space. Though the knife doesn't fit the movie it helps the atmosphere of the piece in total. Without the knife I feel the piece would better fit an exorcism movie as it would take away the dynamic feel of the piece...I know this movie is about murder if nothing else because of the symbolism of the knife, so great idea mixing it in with the religious aspect and most iconic part of the movie.
Congratulations on the DD.