i slapped him a couple hundred times.. and knocked him down several.. You really have to drag your mouse to ko kerry.
To score a "10" consistently, drag the wrist to the far right until your cursor is in the black area of the screen. Now without letting up on your mouse buttom, move the cursor around the main screen while staying in the black area. Bring the cursor to the left of Kerry's head. Release the left mouse button.
Semper Fi and have fun thwacking!