Test Your Sight
Test Your Sight was a bonus game first featured in Mortal Kombat: Deadly Alliance where the character must choose a cup (out of either 3 or 4 or 5 cups) that is filled with water to win Kombat Koins, if the character would choose the wrong cup, the character will die (as the wrong cup is filled with poison) and no Koins will be rewarded.
The bonus game returns in Mortal Kombat (2011 game). This time, the character must choose a severed skull (out of either 3 or 4 or 5 skulls) to find the silver ball. Choosing an empty skull will result in failure and the character dies by a tomahawk thrown to the head.