Sniff test: When not to call 911

"Dear 911, I can smell gas!"
The firefighters rushed in, en masse.
To find that the leak,
Was not from a weak
Piping, but from a sow's ass!

:D

26/11/09: SYDNEY (AFP) – A flatulent pig sparked a gas emergency in southern Australia when a farmer mistook its odours for a leaking pipe, according to officials. Get the story here