咬到 has 2 different meanings in the game. When any player opens their tiles in the beginning of the game and sees the combination of a) and/or b) and c), he will be considered to have 暗咬, and compensation will usually be $6 for each combination of a), b) or c) (all these are cumulative). If after replenishment of tiles (补花"bǔ-huā") happened and any of the a), b) or c) happens, then compensation will usually be $3 for each combination of a), b) or c) (all these are cumulative).