Just in case there are any movie directors reading this blog, for the love of mike, if you have your actor head butt someone, you do NOT have him smack his forehead against his opponent's forehead. If you do this, it will hurt you just as much as the person you're head butting. You aim your forehead at your opponent's nose or mouth, so that you crush and break the nose or knock his teeth out. Your forehead is harder than both these areas. Jeez, people. Get it right. Grrr.