Pedant attack here
Shouldn't it be a gas oven?

/Nearly used 'Oven Nazi' as title before brain kicked in
(mungo_spanner, Thu 29 Nov 2007, 20:25, archived)

Erm,
yes.

That would be the joke explained then...
( WiL can take it all!, Fri 30 Nov 2007, 11:15, archived)