Flying the kite in a low ground pass push quickly and evenly far forward. The kite will roll backwards on the lines and stop. If you immediately pull back on both lines the kite will "reverse" back into flight and continue with the ground pass. If you delay the recovery you can allow the kite to rotate back into a turtled position to effect a reversed 90 degree upwards turn. From a low altitude this also makes for a fast and sudden landing. In fact a kill can be done in any direction. It's just a way of stopping the kites forward movement abruptly.