When the shutters around the Planet Express building are closed, the Xmas lights that were draped around the building have disappeared.
Oxygen is not flammable! It only supports combustion.
A lit cigar would simply burn much faster, but other than that, nothing.
When Fry plays the holophoner no lights are emitted.
At the Svalbard Global Seed Vault in Norway, Bender says to the guard, "Yo, ABBA...". All four members of ABBA are Swedish.