If I was in the light heavyweight division I would fear Chuck Liddell because he is a dangerous striker and his takedown defense is good. It would be a no win situation for me. In the heavyweight division I would fear Tim Sylvia because trying to get him on the ground would be a test of strength and my arms are pretty lanky. If I can't get him on the ground then I would have to strike with him, where I would most likely lose. I probably would fear Frank Mir considering he actually broke Tim Sylvia's arm. Fluke or not that is impressive and a little scary!