All gas, no fire

An Australian farmer smelled a gas leak in his house and promptly called the fire brigade. The fire department arrived with 6 fire trucks and dozens of firemen. In India it would've taken them 6 days to get to the place. Anyway, the firemen detected the source of the gas but it wasnt any leaking pipe. To their amazement they found the source to be a 120 kilo pig er. sow lazing in the garden. The massive animal must've eaten some dinner the night before!