Theory:Doctor Who television discontinuity and plot holes/The Happiness Patrol


 * No matter how hot the red hot poker is it will not ignite a gas cloud; a spark is necessary. How does the Doctor cause the shooting flame from the oven?
 * He opens the oven door with the poker, if the oven door is metal is could be assumed it sparked just enough when struck with the poker to ignite the gas.
 * A spark is not necessary to ignite a gas cloud. The gas just has to be heated above its ignition point.