I think the hicky of Jake's neck is actually the mark of Cain. I know, sounds pretty heavy. But I read that BROTHERS was originally a Danish film.
Synopsis from amazon.com.
Director Susanne Bier resurrects the ancient biblical story of Cain and Abel and sets it in Denmark and Afghanistan in her film "Brothers," which tells the story of Michael (Ulrich Thomsen, so good in "The Celebration") and Jannik (Nikolaj Lie Kaas)...two brothers who are as different from one another as night is from day.I bet Jake is going to be Cain.