This is where you fly the kite up over your head, to the top of the window. Pull both lines evenly to push the kite past that point. Then turn into the wind and pull the kite down at the opposite side of the window by walking downwind. Finish with a 180 to return the kite to it's starting point.
A variation on this trick is done like this: as you get the kite into the position where you start the up and over, turn your back on the kite and pull the lines over your shoulder (going clockwise it would be your left shoulder) take one step away from the kite. As the kite goes past 12 start to pull your hands down and back and also take one step away from the kite (the opposite way to last time). Done this way you hardly loose ground and the kite has a lot of power.