Could these be the spirits people keep seeing? I think so. Here's how to see them. Right after the first mission with Bo straight in front of you a ruby koin will appear and Ermac will run out, grab it, and disappear. A Platinum koin will then appear briefly near the wall to the left of the ruby koin. Next Sub-Zero appears behind the tree to the right of the first dojo. He leaves behind a sapphire koin and disappears. Finally, Scorpion runs out of the alley to the right of the second dojo and the runs into the bushes to the right of the first bridge. Could this be some sort of secret? Maybe you have to get all the appearing koins before they do? I got The ruby koin before Ermac did and it made the sound as if I got it, but then it also immediately made the sound that he got it. I can't get to Sub-Zero quick enough to see if you can get one before him. Same with Scorpion. Any help on figuring this out would be highly appreciated.