Perform Double Flawless Victory and a Stage Fatality if you see a shadow fly across 
the moon on the Pit Stage. After the battle is over you will be taken to the Bottom 
of the Pit where you will have to fight the version of Reptile from the original 
Mortal Kombat 1 (1992). His Special Moves include Scorpion's Spear and Sub-Zero's 
Freeze among others.