In Mortal Kombat 9 (2011 version) for the PS3 and Xbox 360, each character has multiple fatalities that they can perform at the end of the match if your opponent is defeated.
This is the list of fatalities, and the babality and stage fatality for Kung Lao.
These can be unlocked and added to your moves list by performing them in either Arcade Mode or Versus Mode.
Check out these complete fatality guides for more finishing moves:
Fatalities and babalities for Mortal Kombat on Xbox 360
Fatalities and babalities for Mortal Kombat on PS3
Kung Lao’s Fatalities & Finishing Moves
Xbox 360
Hat Trick — Back, Forward, Forward, Back, Y while in sweeping distance
Razor’s Edge — Down, Down, Forward, Back, X while in sweeping distance
Babality — Down, Forward, Down, Y in jumping distance
Stage Fatality — Down, Forward, Down, A at close range
PS3
Hat Trick — Back, Forward, Forward, Back, Triangle while in sweeping distance
Razor’s Edge — Down, Down, Forward, Back, Square while in sweeping distance
Babality — Down, Forward, Down, Triangle in jumping distance
Stage Fatality — Down, Forward, Down, X at close range