Logan Huffman, who played Danny Boy, improvised a lot of his scenes and lines - he gave his axe its name, "Anna Belle," and the scene where he danced with Anna Belle was his own idea.
The term "Final Girl" comes out of a trend in early slasher films where the sole survivor or the last to die was a female character.
When Alexander Ludwig was preparing for an intense scene, director Tyler Shields would punch him in the face and chest. Alexander said he loved it.