Kojux-flap

The kojux-flap was located in the wing of the Sycorax spaceship. On 25 December 2006, the Tenth Doctor threw a satsuma at a switch which triggered the kojux-flap on a Sycorax ship above Earth as the Sycorax leader attempted to strike him down from behind. This caused the ground beneath the Sycorax to break away, sending him falling to his death. (PROSE: The Final Darkness)