In real life, "Face" is used as an emphatic way to communicate "Burn", or "I told you so."
For further explanation of Face, look up "Face."
Tim: I just beat it! x)!
- or -
Before the game:
Bob: The 49'ers are going to win.
Dan: I would go with the Colts.
After the game:
Bob: Did you see the game?
Dan: x) I told you the Colts would win.