Two bored guards distracted by gambling

1) Where and when: anywhere and any time that there are guards on duty but not being supervised by officers.

2) Limitations: The two guards are on their own, there are no other guards nearby.

3) Trigger: The player is close enough to see/hear what the guards are doing.

4) Description: Two guards are having a game of cards or dice or whatever, and they are laying bigger and bigger bets on it. Eventually the bet gets so large that they decide to just go ahead and see who has won. The winner celebrates, the loser claims the other guard cheated, and they end up having a long argument.

5) Notes: If the player interrupts the guards before the actual dice throw or card lay, the guards stop the gambling and concentrate on capturing/attacking the player. However, if the player is clever and waits for the moment where the guards are throwing the dice or laying down the cards, then the player can sneak past them undetected because the guards are concentrating so hard on the dice/cards. If the player waits until the argument, there's a 50/50 chance the guards will notice the player.