Do you know the name of this martial arts movie that showed at the beginning a tug-o-war between one muscular black dude versus several other men. The lead actor is white. I remember he silently took over the other end of the rope. And when the big black guy saw him, he was so happy that he relaxed and as a result, he was pulled into the mud. The lead actor looked American. He recruited the muscular black guy and a beautiful woman to accompany him to some kind of tournament. The movie ended when the bad guy fired his gun at the woman, but the lead actor jumped in front of her. Just when they thought he was dead, he opened his eyes and smiled showing the bullet between his teeth. I am going crazy looking for this movie, but without a title I'm getting nowhere. Please help.

I don't know about the first part of your description, but the teeth catching bullet part sounds like it's from The Last Dragon...
Last Dragon Bruce Leroy catches bullet with his teeth cool movie - YouTube (http://www.youtube.com/watch?v=07Ll9h7EPTA)

Kill and Kill Again (1981) (http://www.imdb.com/title/tt0082612/reference)