ESPN Classic has been running a bunch of old Muhammad Ali matches. I really have to say, I have been thoroughly impressed with how the guy fights. His stance was usually with his arms to his sides. He had reflexes and dodging speed that were inhuman. Even in his later years, you can only truely appreciate his fighting in slow motion. Watching him dodge a strong blow and follow it up with an even stronger left hook, or watching an opponent stick him with a quick left only to find Ali is a faster puncher and throws and makes contact before even his stick hits.
The guy was a freaking machine!