Don't try to knock your opponent out. Hold both the wiimote and nunchuck together and pull them quickly from one side of your body to the other to dodge. Once they swing and miss (and everything goes into Matrix time), throw two jabs to the body and face. Because they are unguarded, it really knocks them out quick. If you play defensive, it makes it much easier. To me, this is what makes the system so exciting. Wii Sports is the tip of the iceberg for what they can do. Tennis, Boxing, Golf, Bowling, and to an extent Baseball had become tired formats on traditional systems because it is just not natural to hit some buttons with your thumb to do these things. There are so many other slight factors that effect the game. The genius of the Wii is the sensitivity of the controller and how a slight curve of the wrist can curve the bowling ball, yet the logic is fuzzy enough to allow anyone to play. You can enjoy it as a kid goofing around or an adult taking the motions seriously. It will be the developers that truly push the boundaries on this that succeed. I would love a great baseball or tennis sim that heavily fine-tunes the control scheme. IMHO, that would be the killer app.