One of the mutant's bodily orifices emits clouds of gas. Roll a D6 every D6 rounds; on a roll of 5 or 6, the mutant emits a cloud of gas. The cloud is D4x2 yards in diameter and lasts for 2D6 rounds. Roll a D6 to determine the effects of the gas produced by the mutant. Gas type does not change once it has been determined. T tests are made for every round spent in the cloud. Everyone caught in the cloud is affected, unless they have specific immunities to the effects. Crazy Gas, for example, will not affect creatures who are immune to psychological effects.