Have you ever had casu marzu?

[Floater]

Suspected gas leak was fermented herring

On Saturday, two fire trucks, two police cars and an emergency gas leak team all rushed towards the Stockholm neighbourhood Södermalm, having been alerted by concerned neighbours who smelled gas in the stairwell, but the unpleasant smell turned out to come from something less dangerous.

http://www.thelocal.se/43110/20120909/