Congratulations Sir Terry, a well deserved honour.

This particular incident was the 1902 eruption of St. Pelee on Martinique which killed 30,000 people in Saint-Pierre. What killed everyone in this case was not CO2 but a Nuee Ardente or pyroclastic flow. http://en.wikipedia.org/wiki/Saint-Pierre,_Martinique There was a survivor who was in the town jail. There used to be some items from the town in the Natural History museum in London, including half molten glasses and bottles.

Father Ted or Father Jack, but not Father Dougal