thats what staying totally calm while fighting and understanding that you only need to move an inch or so to Slip a punch can do ...u really have to almost have somthin wrong w/ you to be that at home in a ring in a fight ...fighters like PBF & james toney and young RJJ have acheived this comfort i believe but its so odd w/ ali cause he was such a big man and still able to move just as fast as PBF