31A YAWNING GAP. A large mouth with yellow carious teeth is present in the middle of the hall. It exhales with bursts of foul-smelling air. To pass adventurers must jump through during its inhalation phase. This requires a roll under dexterity on a 1d20. Failure results in 1d6+2 chomp damage. The teeth may also be separated with a weapon, pole, etc. but the mouth will break such items in 1d4 rounds (figure 1 round for a wooden pole and 4 rounds for a strong bar of steel).