The lawyer for the former chief executive of Pike River Coal, Peter Whittall, says the methane explosion that killed 29 men in the mine could have been ignited by contraband such as cigarette lighters, carried into the mine by the workers.—news item
Ten other possible reasons for the disaster that also absolve management from blame:
Mine worker with Scouting experience rubbing two sticks together to strike a spark.
Candles lit for cake to celebrate somebody's birthday.
Too much accelerant poured on barbecue to get it going.
Sausage sizzle that went tragically wrong.
Miner setting himself alight in protest at persecution of Tibetan monks.
One-bar heater accidentally knocked over by miner at coalface.
Heated towel rail malfunction.
Mine workers having fun during teabreak by waving sparklers.
Major fireworks display.
Kids playing with matches.